A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.
CVE-2026-3012
“▲” beside the score: it is higher than NVD's CVSS score.
Score 8.0 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. NVD baseline CVSS 6.8; sources differ by 1.2.
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 6.8
- EG Score
- 8.0HIGHmedium confidence
- EG Risk
- 36EG Risk 36/100
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)Severity80% × 45%Impact severity (EG Severity): CVSS 8.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.2% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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 within your standard update timelines. - EPSS PROB
- 0.2%
- EPSS %ILE
- 12th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (8.0): severity, escalated by confirmed exploitation. This CVE's 8.0 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.0 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade 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)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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
Published
May 27, 2026
Last Modified
October 15, 2026
Advisory Details (4)
Auto-updated Jun 3, 202616003 – (CVE-2026-3012) [SECURITY] CVE-2026-3012 group policy certificate enrollment uses http:// without validation
https://bugzilla.samba.org/show_bug.cgi?id=160032447319 – (CVE-2026-3012) CVE-2026-3012 samba: group policy certificate enrollment uses http:// without validation
Affected: Red Hat Enterprise Linux 8
https://bugzilla.redhat.com/show_bug.cgi?id=2447319Affected: Red Hat Enterprise Linux 8.
https://access.redhat.com/errata/RHSA-2026:22644Vendor Advisories for CVE-2026-3012(20)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:70586Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.17.58 bug fix and security update
- RHSA-2026:67857Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.15.69 bug fix and security update
- RHSA-2026:65839Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.13.71 bug fix and security update
- RHSA-2026:65907Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.12.98 bug fix and security update
- RHSA-2026:65851Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.18.55 bug fix and security update
- RHSA-2026:62409Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.14.73 bug fix and security update
- RHSA-2026:62549Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.16.70 bug fix and security update
- RHSA-2026:59831Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.12.97 bug fix and security update
- +12 more
Patch Availability(24)
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.
Affected Packages
(6 across 6 ecosystems)
Alpine:v3.23(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| samba | — |
| — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| samba | — |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| samba | 2:4.13.13+dfsg-1~deb11u1 ... 2:4.13.5+dfsg-2 (8 versions) |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| samba | 2:4.17.10+dfsg-0+deb12u1 ... 2:4.17.9+dfsg-0+deb12u3~bpo11+1 (13 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| samba | 2:4.22.3+dfsg-4 ... 2:4.22.8+dfsg-0+deb13u1 (7 versions) |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| samba | 2:4.22.3+dfsg-4 ... 2:4.24.3+dfsg-1~bpo13+1 (30 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(4)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 13× in last 7d / 49× 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 99 of 452 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 353 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-18 03:49 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-15 17:28 UTCVendor advisory
- 2026-10-15 17:27 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-10-15 16:49 UTCEG score recompute
- 2026-10-15 16:49 UTCVendor advisory
- 2026-10-15 16:49 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-12 16:15 UTCEG score recompute
- 2026-10-11 19:58 UTCEG score recompute
- 2026-10-11 17:11 UTCEG score recompute
- 2026-10-11 14:40 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-08 21:21 UTCVendor advisory
- 2026-10-08 21:21 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-10-08 21:04 UTCEG score recompute
- 2026-10-08 21:04 UTCVendor advisory
Show 74 moreShow fewer
- 2026-10-08 21:03 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-10-01 17:28 UTCVendor advisory
- 2026-10-01 17:28 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-10-01 16:47 UTCEG score recompute
- 2026-10-01 16:47 UTCVendor advisory
- 2026-10-01 16:46 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-09-28 02:19 UTCVendor advisory
- 2026-09-28 02:19 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-28 02:12 UTCEG score recompute
- 2026-09-28 02:12 UTCVendor advisory
- 2026-09-28 02:12 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
- 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 11th percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-09-18 13:23 UTCVendor advisory
- 2026-09-18 13:23 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-18 12:19 UTCEG score recompute
- 2026-09-18 12:19 UTCVendor advisory
- 2026-09-18 12:19 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-09-17 19:28 UTCVendor advisory
- 2026-09-17 19:28 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-17 18:29 UTCVendor advisory
- 2026-09-17 18:29 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-17 12:20 UTCVendor advisory
- 2026-09-17 12:20 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-17 12:11 UTCVendor advisory
- 2026-09-17 12:11 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-17 11:49 UTCVendor advisory
- 2026-09-17 11:49 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-17 08:29 UTCVendor advisory
- 2026-09-17 08:29 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-17 08:09 UTCEG score recompute
- 2026-09-17 08:09 UTCVendor advisory
- 2026-09-17 08:09 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 18th percentile
- 2026-09-15 12:30 UTCVendor advisory
- 2026-09-15 12:30 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-15 12:14 UTCEG score recompute
- 2026-09-15 12:14 UTCVendor advisory
- 2026-09-15 12:13 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-14 13:38 UTCVendor advisory
- 2026-09-14 13:38 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-14 13:11 UTCVendor advisory
- 2026-09-14 13:11 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-14 09:24 UTCEG score recompute
- 2026-09-14 09:24 UTCVendor advisory
- 2026-09-14 09:24 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-10 13:38 UTCVendor advisory
- 2026-09-10 13:38 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-10 12:26 UTCVendor advisory
- 2026-09-10 12:26 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-10 10:38 UTCEG score recompute
- 2026-09-10 10:38 UTCVendor advisory
- 2026-09-10 10:38 UTCGHSA enrichmentGHSA-59rx-q76w-hqrw · GitHub severity HIGH · GitHub CVSS 8.0
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
- 2026-09-10 09:32 UTCEG score recompute
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownAlpine:v3.23:samba
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- CVE-2020-1472EG 10.0 KEVEPSS p100CRITICAL
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- CVE-2017-14746EG 9.8EPSS p96CRITICAL
- CVE-2019-10197NVD 6.5EG 9.1CRITICAL
- CVE-2022-42898EG 8.8EPSS p94HIGH
- CVE-2022-32744EG 8.8HIGH
- CVE-2022-2031EG 8.8HIGH
- CVE-2020-25721EG 8.8HIGH
Same vendor
10 shownredhat:RHSA-2026:22644 · redhat:RHSA-2026:56853 · redhat:RHSA-2026:56786
Frequently asked(5)
What is CVE-2026-3012?
When was CVE-2026-3012 made public?
Is CVE-2026-3012 actively exploited?
What is the CVSS score of CVE-2026-3012?
How do I remediate CVE-2026-3012?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-3012
Is Your Infrastructure Affected by CVE-2026-3012?
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