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Vulnerabilities

Vulnerability · CVE-2026-82049

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.

Published Sep 14, 2026 · catalog updated Oct 28, 2026 · In CPython 3.13 and

Last checked Oct 28, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-82049. EPSS is 0.19%. Act only if a listed version of In CPython 3.13 and is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (In CPython 3.13 and).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.19%
Remediation
Advisory link
Affected products
Debian:13 pypy3 · Debian:13 python3.13 · Debian:14 pypy3 · Debian:14 python3.13

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:13 pypy37.3.19+dfsg-2, 7.3.20+dfsg-1, 7.3.20+dfsg-2
  • Debian:13 python3.133.13.11-1, 3.13.12-1, 3.13.14-1
  • Debian:14 pypy30 → 8.0.1+dfsg-1
  • Debian:14 python3.133.13.11-1, 3.13.12-1, 3.13.14-1

How to fix CVE-2026-82049

  • Upgrade

    CVE-2026-82049 lists a fix boundary at 8.0.1+dfsg-1. Compare the installed build with that boundary before you change production.

  • Version check

    Fixed in 8.0.1+dfsg-1 · 9 other ranges on the advisory

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-82049. EPSS is 0.19%. Act only if a listed version of In CPython 3.13 and is installed.

Which versions are affected?

Compare what you have installed with 7.3.19+dfsg-2, 7.3.20+dfsg-1, 7.3.20+dfsg-2, 3.13.11-1, 3.13.12-1, 3.13.14-1, 0 → 8.0.1+dfsg-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.19%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 14, 2026 · Trivy Vulnerability DB

    Detected

    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.

  2. Oct 28, 2026 · Trivy Vulnerability DB

    Fix available

    pypy3 fixed in 8.0.1+dfsg-1

  3. Oct 28, 2026 · Trivy Vulnerability DB

    Fix available

    pypy3 fixed in 8.0.1+dfsg-1

  4. Oct 28, 2026 · Trivy Vulnerability DB

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-82049

    Official CVE identifier

    cve.org
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-82049

    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 dire

    osv.dev

References

Freshness

Last verified in this catalog Oct 28, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 28, 2026
  • Trivy Vulnerability DBOct 28, 2026
CVE-2026-82049: In CPython 3.13 and earlier, the tarfile module's d… · ZeroDay Findings