Red Hat Security Advisory: python security update

Fixed packages 8

Vulnerabilities 2

• Medium 5.9
  CVE-2025-15366

  IMAP command injection in user-controlled commands

  The imaplib module, when passed a user-controlled command, can have additional commands injected using newlines. Mitigation rejects commands containing control characters.

  Python Software Foundation CPython python3.4 python3.5 Debian Ubuntu Azure Linux Alpine Wolfi
  Jan 20, 2026
• Medium 5.9
  CVE-2025-15367

  POP3 command injection in user-controlled commands

  The poplib module, when passed a user-controlled command, can have additional commands injected using newlines. Mitigation rejects commands containing control characters.

  Python Software Foundation CPython python3.4 python3.5 Debian Ubuntu Azure Linux Wolfi
  Jan 20, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2431368
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2431373
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_5393.json
• report
  https://access.redhat.com/security/cve/CVE-2025-15366
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-15366
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-15366
• article
  https://github.com/python/cpython/issues/143921
• article
  https://github.com/python/cpython/pull/143922
• article
  https://mail.python.org/archives/list/security-announce@python.org/thread/DD7C7JZJYTBXMDOWKCEIEBJLBRU64OMR/
• report
  https://access.redhat.com/security/cve/CVE-2025-15367
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-15367
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-15367
• article
  https://github.com/python/cpython/issues/143923
• article
  https://github.com/python/cpython/pull/143924
• article
  https://mail.python.org/archives/list/security-announce@python.org/thread/CBFBOWVGGUJFSGITQCCBZS4GEYYZ7ZNE/