Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client. This issue affects all MongoDB Server v7.0 prior to 7.0.28 versions, MongoDB Server v8.0 versions prior to 8.0.17, MongoDB Server v8.2 versions prior to 8.2.3, MongoDB Server v6.0 versions prior to 6.0.27, MongoDB Server v5.0 versions prior to 5.0.32, MongoDB Server v4.4 versions prior to 4.4.30, MongoDB Server v4.2 versions greater than or equal to 4.2.0, MongoDB Server v4.0 versions greater than or equal to 4.0.0, and MongoDB Server v3.6 versions greater than or equal to 3.6.0.
CVE-2025-14847
“▲” beside the score: it is higher than NVD's CVSS score.
Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-12-29), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 retained for reference. The 9.0 is the floor for confirmed exploitation, not an impact rating: this CVE's impact severity (EG Severity) is CVSS 7.5 HIGH under GitHub Security Advisory CVSS. Confidence: HIGH.
- 2,939 internet-facing services (distinct ip:port) on record running an affected version — derived from Shodan data (© Shodan); a patched service can stay counted while its port stays open
- Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low or medium mission impact
A fix is available — apply it.
2,939 internet-facing services (distinct ip:port) on record running a version that maps to CVE-2025-14847, in our KEV-Exposure radar’s Shodan-derived sample.
How it counts: every 12 hours, when Shodan query credits allow, the radar runs one Shodan query per tracked product, reads up to 100 ip:port services per query, and keeps a service when its banner version matches a CISA-KEV or high-EPSS CVE; a service is dropped when neither a search nor a Shodan InternetDB port re-check has refreshed it for 21 days. A re-check that finds the port still listed by Shodan InternetDB refreshes the service without re-reading the banner, so a patched service can stay counted while its port stays open. A count is a banner-version inference over a sample, not an exploit test and not an internet-wide census, and the unit is a service, not a machine: a machine answering on two ports counts twice.
- CVSS v3
- 7.5
- EG Score
- 9.0CRITICALhigh confidence
- EG Risk
- 89EG Risk 89/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation100% × 40%Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Attend at low or medium mission impact; Act at high (mission-essential systems).Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it sooner than your standard update timelines at low or medium mission impact and as soon as possible at high. - EPSS PROB
- 83%
- EPSS %ILE
- 99th
- KEV
- ⚠ Exploited
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is the CISA KEV floor for confirmed exploitation, not an impact rating: its impact severity (EG Severity) is CVSS 7.5 HIGH.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 83% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-19). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Attend at medium mission impactAttend at low or medium mission impact; Act at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 14 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Attend at low or medium mission impact; Act at high (mission-essential systems).
A fix is available. Apply it sooner than your standard update timelines at low or medium mission impact and as soon as possible at high.
Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 14 days if it is not.
In CISA KEV yes (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
CISA required action“Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.”
Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. CISA's notes: https://jira.mongodb.org/browse/SERVER-115508 · https://nvd.nist.gov/vuln/detail/CVE-2025-14847
Published
December 19, 2025
Last Modified
January 13, 2026
Advisory Details (6)
Auto-updated Oct 20, 2026Known Exploited Vulnerabilities Catalog | CISA
Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-14847CVE-2025-14847 Mitigation Script - Heap Memory Exposure in MongoDB Server - vsociety
https://www.vicarius.io/vsociety/posts/cve-2025-14847-mitigation-script-heap-memory-exposure-in-mongodb-serverCVE-2025-14847 Detection Script - Heap Memory Exposure in MongoDB Server - vsociety
https://www.vicarius.io/vsociety/posts/cve-2025-14847-detection-script-heap-memory-exposure-in-mongodb-serveross-security - "MongoBleed" CVE-2025-14847 in many versions of MongoDB
http://www.openwall.com/lists/oss-security/2025/12/29/21MongoBleed: Pre-Auth Memory Disclosure via OP_COMPRESSED in MongoDB (CVE-2025-14847)
https://www.smartkeyss.com/post/mongobleed-pre-auth-memory-disclosure-via-op_compressed-in-mongodb-cve-2025-14847Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | mongodb-server-core (1:3.6.3-0ubuntu1.4+esm2) @ bionic | 2026-10-19 | ubuntu |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(1)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 18× in last 7d / 266× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 1,557 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 1,457 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-20 16:26 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-19 18:39 UTCEG score recompute
- 2026-10-19 18:39 UTCVendor advisory
- 2026-10-19 18:39 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-19 16:30 UTCEPSS rescoreEPSS 83% · 99th percentile
- 2026-10-18 16:26 UTCVendor advisory
- 2026-10-18 16:26 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-18 05:48 UTCEG score recompute
- 2026-10-17 18:26 UTCEG score recompute
- 2026-10-17 18:26 UTCVendor advisory
- 2026-10-17 18:26 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-16 16:15 UTCEG score recompute
- 2026-10-16 16:15 UTCVendor advisory
- 2026-10-16 16:15 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-15 16:30 UTCEPSS rescoreEPSS 83% · 99th percentile
- 2026-10-15 14:03 UTCEG score recompute
- 2026-10-15 14:03 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-14 16:31 UTCEPSS rescoreEPSS 83% · 99th percentile
- 2026-10-14 11:49 UTCEG score recompute
- 2026-10-14 11:49 UTCVendor advisory
- 2026-10-14 11:49 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-13 16:31 UTCEPSS rescoreEPSS 83% · 99th percentile
- 2026-10-13 09:37 UTCVendor advisory
- 2026-10-13 09:37 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-12 17:22 UTCEG score recompute
Show 75 moreShow fewer
- 2026-10-12 07:25 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-12 03:16 UTCVendor advisory
- 2026-10-12 03:16 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 23:06 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 20:53 UTCEG score recompute
- 2026-10-11 18:59 UTCEG score recompute
- 2026-10-11 18:59 UTCVendor advisory
- 2026-10-11 18:58 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 14:50 UTCEG score recompute
- 2026-10-11 14:50 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 10:42 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 06:35 UTCVendor advisory
- 2026-10-11 06:35 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 02:27 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-10 22:17 UTCEG score recompute
- 2026-10-10 22:17 UTCVendor advisory
- 2026-10-10 22:17 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-10 19:58 UTCEPSS rescoreEPSS 83% · 99th percentile
- 2026-10-10 18:10 UTCVendor advisory
- 2026-10-10 18:10 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-10 14:01 UTCVendor advisory
- 2026-10-10 14:01 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-10 09:54 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-10 05:46 UTCVendor advisory
- 2026-10-10 05:45 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-10 01:37 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-09 21:29 UTCVendor advisory
- 2026-10-09 21:29 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-09 17:22 UTCVendor advisory
- 2026-10-09 17:21 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-09 13:11 UTCVendor advisory
- 2026-10-09 13:11 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-09 09:03 UTCVendor advisory
- 2026-10-09 09:03 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-09 04:55 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-09 00:47 UTCVendor advisory
- 2026-10-09 00:47 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-08 20:39 UTCVendor advisory
- 2026-10-08 20:39 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-08 16:32 UTCVendor advisory
- 2026-10-08 16:32 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-08 12:24 UTCVendor advisory
- 2026-10-08 12:24 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-08 08:16 UTCVendor advisory
- 2026-10-08 08:16 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-08 04:07 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-07 23:59 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-07 19:51 UTCVendor advisory
- 2026-10-07 19:51 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-07 15:42 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-07 11:34 UTCVendor advisory
- 2026-10-07 11:34 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-07 07:25 UTCVendor advisory
- 2026-10-07 07:25 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-07 03:17 UTCVendor advisory
- 2026-10-07 03:17 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-06 23:09 UTCVendor advisory
- 2026-10-06 23:09 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-06 19:02 UTCEG score recompute
- 2026-10-06 19:02 UTCVendor advisory
- 2026-10-06 19:02 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-06 15:16 UTCEPSS rescoreEPSS 83% · 99th percentile
- 2026-10-06 14:49 UTCVendor advisory
- 2026-10-06 14:49 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-06 10:41 UTCVendor advisory
- 2026-10-06 10:41 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-06 06:33 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-06 02:23 UTCVendor advisory
- 2026-10-06 02:23 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-05 22:14 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-05 18:06 UTCVendor advisory
- 2026-10-05 18:06 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-05 13:58 UTCVendor advisory
- 2026-10-05 13:58 UTCGHSA enrichmentGHSA-4742-mr57-2r9j · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-05 09:51 UTCVendor advisory
Publicly available exploits
(16 references, 10 shown)Public exploit code is referenced for this CVE (1 Metasploit module, 12 GitHub PoCs), as are 2 Nuclei detection templates, 1 GitHub checker repository. A detection template checks whether a system is affected; it is not necessarily exploit code. A GitHub repository named or described as a checker or scanner checks whether a system is affected; it is not necessarily exploit code. Defenders should treat patch urgency accordingly.
- Metasploitauxiliary/scanner/mongodb/cve_2025_14847_mongobleed✓ verifiedPublished Dec 30, 2025
MongoDB Memory Disclosure (CVE-2025-14847) - Mongobleed
Open source ↗ - GitHub PoCshokribardiya/CVE-2025-14847-mongobleedPublished Jun 14, 2026
CVE-2025-14847 mongobleed python file
Open source ↗ - GitHub PoCsho-luv/MongoBleedPublished Feb 7, 2026
CVE-2025-14847 (MongoBleed) scanner and exploit tool. Unauthenticated MongoDB heap memory leak via zlib decompression. Detection, memory extraction, credential parsing, CIDR/batch scanning, Nuclei templates, and CTF lab included
Open source ↗ - GitHub PoCpeakcyber-security/CVE-2025-14847Published Jan 12, 2026
CVE-2025-14847 | MongoBleed vulnerability proof of concept project
Open source ↗ - GitHub PoCchinaxploiter/CVE-2025-14847-PoCPublished Dec 29, 2025
Academic proof-of-concept demonstrating CVE-2025-14847 for authorized security research.
Open source ↗ - GitHub PoCcodeb0ssx/CVE-2025-14847-PoCPublished Dec 29, 2025
Academic proof-of-concept demonstrating CVE-2025-14847 for authorized security research.
Open source ↗ - GitHub PoCjoshuavanderpoll/CVE-2025-14847Published Dec 29, 2025
CVE-2025-14847 (MongoBleed)
Open source ↗ - GitHub PoCSecurity-Phoenix-demo/mongobleed-exploit-CVE-2025-14847Published Dec 29, 2025
Exploit lab, docker and code scanner for mongobleed Vulnerability CVE-2025-14847 plus Phoenix Security Sync tools
Open source ↗ - Nucleijavascript/cves/2025/CVE-2025-14847.yamlPublished Dec 29, 2025
MongoDB Server - Information Disclosure (MongoBleed)
Open source ↗ - Nucleinetwork/cves/2025/CVE-2025-14847.yamlPublished Dec 29, 2025
MongoDB Server - Information Disclosure (MongoBleed)
Open source ↗
Related CVEs(same CWE)
Frequently asked(6)
What is CVE-2025-14847?
When was the CVE record for CVE-2025-14847 published?
Is CVE-2025-14847 actively exploited?
What is the CVSS score of CVE-2025-14847?
Which products are affected by CVE-2025-14847?
How do I remediate CVE-2025-14847?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2025-14847
Is Your Infrastructure Affected by CVE-2025-14847?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.