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CVE-2026-15310VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-15310· Low 2.1

Not known to be exploited · CVSS 2.1 Low · fixed in Red Hat package updates : update Red Hat CPython when convenient.

Data as of 30 Oct 2026, 08:02 UTC

CVSS 4.0 base score
2.1Low
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 3.15.0rc2, 3.14.8, 3.13.16 +3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Aug 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 29 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Python Software FoundationCPythonAffected
  • >=3.15.0a1 <3.15.0rc2
Fixed in
  • 3.15.0rc2
Python Software FoundationCPythonAffected
  • >=3.14.0 <3.14.8
Fixed in
  • 3.14.8
Python Software FoundationCPythonAffected
  • >=3.13.0 <3.13.16
Fixed in
  • 3.13.16
Python Software FoundationCPythonAffected
  • >=3.12.0 <3.12.15
Fixed in
  • 3.12.15
Python Software FoundationCPythonAffected
  • >=3.11.0 <3.11.17
Fixed in
  • 3.11.17
Python Software FoundationCPythonAffected
  • <3.10.22
Fixed in
  • 3.10.22

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

AI-suggested

A security update is available and should be applied by upgrading to the fixed Python 3.12 packages version 3.12.14-1.1.hum1 provided by Red Hat Hardened Images RPMs. No additional mitigations are indicated by the vendor advisory. Systems that do not parse untrusted compressed files or that enforce memory limits via containers or cgroups are at reduced risk.

Description

A security update for Red Hat Hardened Images RPMs addresses multiple vulnerabilities in Python 3.12, including CVE-2026-15310. This particular flaw involves Python decompressing specially crafted zip files using bzip, LZMA, or Zstandard compression methods, which may cause excessive memory allocation leading to denial of service (DoS). The vulnerabilities require an application or user to parse untrusted archives, limiting the impact to process-level resource exhaustion. Red Hat Hardened Images packages for Python 3.12 have been updated to version 3.12.14-1.1.hum1 to fix these issues.

References

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