8.4

CVE-2026-82049: python software foundation cpython Link Following

CVSS: 8.4v4.0HighAwaiting analysis
AliasesALPINE-CVE-2026-82049UBUNTU-CVE-2026-82049DEBIAN-CVE-2026-82049
Published 14-09-2026Last modified 11-10-2026
Open JSON

Vulnerability summary

CVE-2026-82049 is a high (CVSS 8.4) Link Following vulnerability in python software foundation cpython. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 7.8% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.4/10
010
High · v4.0 (CVE.org)
EPSS score
0.19%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 7
OPENSUSE-SU-2026:12069-1OPENSUSE-SU-2026:12087-1OPENSUSE-SU-2026:12121-1OPENSUSE-SU-2026:12122-1OPENSUSE-SU-2026:12123-1RHSA-2026:65505

Timeline

  1. 14-09-2026
    PublishedVulnerability first disclosed.
  2. 11-10-2026
    Last modifiedVulnerability information updated.

Description

In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

+0.01 pp

From 0.18% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu12 products
  • pypy3All versions (No fix recorded)
  • python2.7All versions (No fix recorded)
  • python3.10All versions (No fix recorded)
  • python3.11All versions (No fix recorded)
  • python3.12All versions (No fix recorded)
Chainguard4 products
  • python-3.10< 3.10.22-r1
  • python-3.11< 3.11.17-r1
  • python-3.12< 3.12.15-r0
  • python-3.13< 3.13.15_git20260912-r0
Wolfi4 products
  • python-3.10< 3.10.22-r1
  • python-3.11< 3.11.17-r1
  • python-3.12< 3.12.15-r0
  • python-3.13< 3.13.15_git20260912-r0
Debian2 products
  • pypy3All versions (No fix recorded)
  • python3.13All versions (No fix recorded)
Alpine1 product
  • python3< 3.12.15-r0 | < 3.14.8-r0
Python software foundation1 product
  • cpython< 3.10.22 | ≥ 3.11.0, < 3.11.17 | ≥ 3.12.0, < 3.12.15 | ≥ 3.13.0, < 3.13.16 | ≥ 3.14.0a1, < 3.14.0b1

6 vendors · 24 products

References

23 links
Show all 23 references