7.5

CVE-2025-4435: Tarfile extracts filtered members when errorlevel=0

Deferred
AliasesUBUNTU-CVE-2025-4435DEBIAN-CVE-2025-4435CGA-3xwx-5fgx-c58m
Published 03-06-2025Last modified 31-07-2026

Vulnerability summary

CVE-2025-4435 is a high (CVSS 7.5) Incorrect Calculation vulnerability in python software foundation cpython. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 49.5% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.62%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 27 · Related 15
MGASA-2025-0280OPENSUSE-SU-2025:15289-1OPENSUSE-SU-2025:15713-1RHSA-2025:10026RHSA-2025:10028RHSA-2025:10031

Timeline

  1. 03-06-2025
    PublishedVulnerability first disclosed.
  2. 31-07-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.62%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.59% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian2 products
  • pypy3All versions (No fix recorded) | < 7.3.20+dfsg-2
  • python3.13< 3.13.4-1
Ubuntu2 products
  • python3.12< 3.12.3-1ubuntu0.7
  • python3.14< 3.14.0-1
Chainguard1 product
  • python-3.13< 3.13.4-r0
Python software foundation1 product
  • cpython< 3.9.23 | ≥ 3.10.0, < 3.10.18 | ≥ 3.11.0, < 3.11.13 | ≥ 3.12.0, < 3.12.11 | ≥ 3.13.0, < 3.13.4 | ≥ 3.14.0a1, < 3.14.0b3
Wolfi1 product
  • python-3.13< 3.13.4-r0

5 vendors · 7 products

References

19 links
Show all 19 references