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CVE-2026-6019VulnerabilityPublished Updated

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

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-6019· 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 6 Nov 2026, 01:32 UTC

CVSS 4.0 base score
2.1Low
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 3.15.0b1, 3.14.5rc1, 3.13.14
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Apr 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 5 Nov 2026.

What to do

Upgrade CPython to 3.15.0b1, 3.14.5rc1 or 3.13.14.

Affected software

ProductAffectedFixed in
Python Software FoundationCPythonAffected
  • >=3.15.0a1 <3.15.0b1
Fixed in
  • 3.15.0b1
Python Software FoundationCPythonAffected
  • >=3.14.0a1 <3.14.5rc1
Fixed in
  • 3.14.5rc1
Python Software FoundationCPythonAffected
  • <3.13.14
Fixed in
  • 3.13.14
PyPIcpythonpkg:pypi/cpythonOther threatsAffected
  • =3.14.0
  • =3.15.0
Fixed in–
GitHubCPythonpkg:github/CPythonOther threatsAffected
  • <3.13.14
  • >=3.14.0a1 <3.14.5rc1
  • >=3.15.0a1 <3.15.0b1
Fixed in
  • 3.13.14
  • 3.14.5rc1
  • 3.15.0b1

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 python3.11 RPM packages (version 3.11.15-4.3.hum1) that fix this vulnerability. Users of Red Hat Hardened Images should apply these updates promptly to remediate the issue. No alternative mitigations meeting Red Hat's criteria for ease of use and applicability are currently available. Refer to Red Hat's advisory and update repositories for detailed instructions on applying the fix.

Description

A security flaw was found in Python's http.cookies module used in Red Hat Hardened Images. The Morsel.js_output() function does not properly neutralize the </script> HTML sequence, which could allow remote attackers to inject malicious JavaScript into web pages. This vulnerability can lead to Cross-Site Scripting (XSS) attacks, potentially causing information disclosure or arbitrary code execution in the user's browser. Red Hat has released updated python3.11 RPM packages addressing this issue. No alternative mitigations meeting Red Hat's criteria are currently available.

References

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