Arbitrary Command Injection The advisory has been revoked - it doesn't affect any version of package python3-idle (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-PYTHON3IDLE-15053368
- published22 Jan 2026
- disclosed1 Jan 2025
Introduced: 1 Jan 2025
CVE-2025-15366 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python3-idle package and not the python3-idle package as distributed by RHEL.
The imaplib module, when passed a user-controlled command, can have additional commands injected using newlines. Mitigation rejects commands containing control characters.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2431368
- https://access.redhat.com/security/cve/CVE-2025-15366
- https://access.redhat.com/errata/RHSA-2026:4713
- https://access.redhat.com/errata/RHSA-2026:5315
- https://access.redhat.com/errata/RHSA-2026:5979
- https://access.redhat.com/errata/RHSA-2026:8822
- https://access.redhat.com/errata/RHSA-2026:8824
- https://access.redhat.com/errata/RHSA-2026:9228
- https://github.com/python/cpython/issues/143921
- https://github.com/python/cpython/pull/143922
- https://mail.python.org/archives/list/security-announce@python.org/thread/DD7C7JZJYTBXMDOWKCEIEBJLBRU64OMR/
- https://github.com/python/cpython/commit/6262704b134db2a4ba12e85ecfbd968534f28b45
- https://github.com/python/cpython/commit/298182272a740ce2016aee2f54acbd0bba1944c1
- https://github.com/python/cpython/commit/71926d943c05bde79bd2a866933103541d91b6a2
- https://github.com/python/cpython/commit/d0921efb665aff26b378f495e5ff84f7e3fe649d
- https://github.com/python/cpython/commit/f2cd7ef89aa8a0dcbc7283bbd39548b76f2a736a