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CVE-2026-12345VulnerabilityPublished

Red Hat Security Advisory: python3.12 security, bug fix, and enhancement update

Affects Red Hat python3.12 security,Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-12345· Medium 5.9

Not known to be exploited · CVSS 5.9 Medium · fixed in Red Hat package updates : update Red Hat CPython when convenient.

Data as of 11 Nov 2026, 15:32 UTC

CVSS 4.0 base score
5.9Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (PSF)CVSS 4.05.9
Patch
Available – fixed in 3.15.0rc3, 3.14.9, 3.13.18 +1
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade CPython to 3.15.0rc3, 3.14.9, 3.13.18 or 3.12.15.

Affected software

ProductAffectedFixed in
Python Software FoundationCPythonAffected
  • >=3.15.0a1 <3.15.0rc3
Fixed in
  • 3.15.0rc3
Python Software FoundationCPythonAffected
  • >=3.14.0 <3.14.9
Fixed in
  • 3.14.9
Python Software FoundationCPythonAffected
  • >=3.13.0 <3.13.18
Fixed in
  • 3.13.18
Python Software FoundationCPythonAffected
  • <3.12.15
Fixed in
  • 3.12.15
GitHubCPythonpkg:github/CPythonOther threatsAffected
  • <3.12.15
  • >=3.13.0 <3.13.18
  • >=3.14.0 <3.14.9
  • >=3.15.0a1 <3.15.0rc3
Fixed in
  • 3.12.15
  • 3.13.18
  • 3.14.9
  • 3.15.0rc3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released an official update for python3.12 that fixes this vulnerability. Users of Red Hat Enterprise Linux 10 should apply the python3.12 update (version 3.12.16-2.el10_3 or later) as provided in the Red Hat advisory RHSA-2026:98615. Detailed update instructions are available at https://access.redhat.com/articles/11258. Applying this update fully mitigates the vulnerability.

Description

A race condition vulnerability in Python 3.12 used in Red Hat Enterprise Linux 10 allows arbitrary file deletion during temporary directory cleanup. This issue is tracked as CVE-2026-12345 and has been rated as moderate severity by Red Hat. An update to python3.12 is available that addresses this security flaw along with other bug fixes and enhancements.

References

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