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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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Mentioned vulnerabilities

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, 11:52 UTC

CVSS 4.0 base score
2.1Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
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 30 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

Red Hat has released updated python3.13 RPM packages (version 3.13.15-1.1.hum1) that address these vulnerabilities. Users should apply these updates to mitigate the risk. Since exploitation requires processing untrusted archives, avoiding or restricting such operations can reduce exposure. No additional mitigations are specified by Red Hat.

Description

A security update for Red Hat Hardened Images RPMs addresses multiple vulnerabilities in python3.13, including CVE-2026-15310. The primary issue involves Python's decompression of specially crafted zip files using bzip, LZMA, or Zstandard compression, which may lead to excessive memory allocation and potential denial of service. The vulnerabilities require an application or user to process untrusted archives, limiting the risk to process-level resource exhaustion. Red Hat provides updated python3.13 packages to mitigate these issues.

References

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