When using a TarFile.errorlevel = 0 and extracting with a filter the documented behavior is that any filtered members would be skipped and not extracted. However the actual behavior of TarFile.errorlevel = 0 in affected versions is that the member would still be extracted and not skipped.
CVE-2025-4435
“—” beside the score: it is equal to NVD's CVSS score.
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-06-03. NVD baseline CVSS 7.5; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 49EG Risk 49/100
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.Exploitation0.6% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (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 within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.6%
- EPSS %ILE
- 47th
- 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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.6% 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 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)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (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)14 days if the affected system is publicly exposed; 60 days if it is not.
In CISA KEV no (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
Published
June 3, 2025
Last Modified
July 31, 2026
Advisory Details (10)
Auto-updated Jul 30, 2026commit 9c1110ef6652 (python/cpython)
Fix landed in python/cpython commit 9c1110ef6652 — awaiting tagged release
https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965acommit 4633f3f497b1 (python/cpython)
Fix landed in python/cpython commit 4633f3f497b1 — awaiting tagged release
https://github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2ecommit 28463dba112a (python/cpython)
Fix landed in python/cpython commit 28463dba112a — awaiting tagged release
https://github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9commit aa9eb5f757ce (python/cpython)
Fix landed in python/cpython commit aa9eb5f757ce — awaiting tagged release
https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01commit 19de092debb3 (python/cpython)
Fix landed in python/cpython commit 19de092debb3 — awaiting tagged release
https://github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951dacommit 9e0ac76d96cf (python/cpython)
Fix landed in python/cpython commit 9e0ac76d96cf — awaiting tagged release
https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2acommit 3612d8f51741 (python/cpython)
Fix landed in python/cpython commit 3612d8f51741 — awaiting tagged release
https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390aMailman 3 Multiple CVEs (1 CRITICAL, 3 HIGH, 1 MODERATE) affecting the tarfile module - Security-announce - python.org
https://mail.python.org/archives/list/[email protected]/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/gh-135034: Normalize link targets in tarfile, add `os.path.realpath(strict='allow_missing')`
Fix merged in python/cpython PR #135037 on 2025-06-03 — awaiting tagged release
https://github.com/python/cpython/pull/135037Multiple tarfile extraction filter bypasses (`filter="tar"`/`filter="data"`) · Issue #135034 · python/cpython · GitHub
https://github.com/python/cpython/issues/135034Vendor Advisories for CVE-2025-4435(15)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2025:23530Red Hat Product SecurityHigh
Red Hat Security Advisory: python39:3.9 security update
- CVE-2025-4435Microsoft Security Response Center (MSRC)Medium
Tarfile extracts filtered members when errorlevel=0
- RHSA-2025:13267Red Hat Product SecurityHigh
Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage
- RHSA-2025:10602Red Hat Product SecurityHigh
Red Hat Security Advisory: python3 security update
- RHSA-2025:10484Red Hat Product SecurityHigh
Red Hat Security Advisory: python3 security update
- RHSA-2025:10399Red Hat Product SecurityHigh
Red Hat Security Advisory: python3.9 security update
- RHSA-2025:10189Red Hat Product SecurityHigh
Red Hat Security Advisory: python3.12 security update
- RHSA-2025:10148Red Hat Product SecurityHigh
Red Hat Security Advisory: python3.11 security update
- +7 more
Patch Availability(15)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | python3.13-venv (3.13.0-1ubuntu0.3) @ oracular | 2026-05-21 | ubuntu |
| redhat | python39-devel:3.9-8100020251126112422.d47b87a4 | 2025-12-18 | redhat |
| redhat | discovery/discovery-server-rhel9:2.0.1-1754478727 | 2025-08-06 | redhat |
| redhat | python3-0:3.6.8-51.el8_8.10 | 2025-07-08 | redhat |
| redhat | python3-0:3.6.8-47.el8_6.8 | 2025-07-07 | redhat |
| redhat | python3.9-0:3.9.18-3.el9_4.8 | 2025-07-07 | redhat |
| redhat | python3.12-0:3.12.9-1.el9_6.1 | 2025-07-02 | redhat |
| redhat | python3.12-0:3.12.11-1.el8_10 | 2025-07-01 | redhat |
| redhat | python3.11-0:3.11.13-1.el8_10 | 2025-07-01 | redhat |
| redhat | python3.9-0:3.9.21-2.el9_6.1 | 2025-07-01 | redhat |
| redhat | python3.11-0:3.11.11-2.el9_6.1 | 2025-07-01 | redhat |
| redhat | python3-0:3.6.8-70.el8_10 | 2025-07-01 | redhat |
| redhat | python3.12-0:3.12.1-4.el9_4.6 | 2025-07-01 | redhat |
| redhat | python3.12-0:3.12.9-2.el10_0.2 | 2025-07-01 | redhat |
| redhat | python3.11-0:3.11.7-1.el9_4.8 | 2025-06-30 | redhat |
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
(4 across 2 ecosystems)
Debian:13(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pypy3 | 7.3.19+dfsg-2 ... 7.3.23+dfsg-1 (11 versions) |
| — |
| python3.13 | — |
| — |
Debian:14(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| pypy3 | 7.3.19+dfsg-2, 7.3.20+dfsg-1 |
| — |
| python3.13 | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(1)
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 9× in last 7d / 35× 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 94 of 233 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. 6 repeat rows among the latest 100 are merged into the row they repeat. The 139 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-18 15:38 UTCVendor advisory
- 2026-10-18 15:37 UTCGHSA enrichmentGHSA-p72v-37h5-753v · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-18 05:32 UTCEG score recompute
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-16 16:38 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-12 17:04 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-11 20:37 UTCEG score recompute
- 2026-10-11 18:48 UTCEG score recompute
- 2026-10-11 15:24 UTCEG score recompute
- 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-10 10:03 UTCOSV refresh
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-08 17:10 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 46th percentile
Show 69 moreShow fewer
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-27 13:45 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-26 00:25 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-21 21:06 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-20 19:44 UTCOSV refresh
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-17 19:29 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-15 03:09 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-05 15:28 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-09-01 19:35 UTCOSV refresh
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-24 09:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-15 21:07 UTCOSV refresh
- 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-11 13:41 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-05 19:16 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-07-31 14:25 UTCVendor advisory
- 2026-07-31 14:25 UTCGHSA enrichmentGHSA-p72v-37h5-753v · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-07-31 14:09 UTCVendor advisory
- 2026-07-31 14:09 UTCGHSA enrichmentGHSA-p72v-37h5-753v · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-07-30 23:20 UTCVendor advisory
- 2026-07-30 23:20 UTCGHSA enrichmentGHSA-p72v-37h5-753v · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-07-30 22:22 UTCEG score recompute
- 2026-07-30 22:22 UTCVendor advisory
- 2026-07-30 22:21 UTCGHSA enrichmentGHSA-p72v-37h5-753v · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.5% · 39th percentile
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:13:python3.13
Same vendor
10 shownredhat:RHSA-2025:10026 · redhat:RHSA-2025:13267 · redhat:RHSA-2025:23530
Frequently asked(5)
What is CVE-2025-4435?
When was the CVE record for CVE-2025-4435 published?
Is CVE-2025-4435 actively exploited?
What is the CVSS score of CVE-2025-4435?
How do I remediate CVE-2025-4435?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-4435
Is Your Infrastructure Affected by CVE-2025-4435?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.