Description
When using the "configparser" module to write configuration files containing multi-line text values with carriage return characters (\r) the resulting file could be injected with unexpected keys and values if the attacker controls the written value.
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Python Software Foundation | CPython | < 3.10.21; >= 3.11.0, < 3.11.16; >= 3.12.0, < 3.12.14; >= 3.13.0, < 3.13.15; >= 3.14.0, < 3.14.7; >= 3.15.0a1, < 3.15.0b4 |
References
- https://github.com/python/cpython/commit/0adb386f6e68eb2e73d32e19f235d012df009528Patch
- https://github.com/python/cpython/commit/12dcbd74d3563016a8cb8c47e4898889f34f74ddPatch
- https://github.com/python/cpython/commit/274de100bbf4345bd0c23ef5b446722e9e636908Patch
- https://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851fPatch
- https://github.com/python/cpython/commit/71f2e02a52d47417a6fd69f456346cd8aa7aca98Patch
- https://github.com/python/cpython/commit/aaf850fd333cd89e9aada03d92aaa788a6cb1bb8Patch
- https://github.com/python/cpython/commit/db4a157c790479710a1a840d7937c5c815a6f8b6Patch
- https://github.com/python/cpython/issues/143927Issue Tracking, Patch
- https://github.com/python/cpython/pull/151559Issue Tracking, Patch
- https://mail.python.org/archives/list/security-announce@python.org/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/Mailing List, Vendor Advisory
Timeline
- Published
- Jun 23, 2026
- Last modified
- Oct 25, 2026
- NVD status
- Analyzed