Detections
Analytics
CVE-2026-0864
medium
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.
References
https://mail.python.org/archives/list/[email protected]/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/
https://github.com/python/cpython/pull/151559
https://github.com/python/cpython/issues/143927
https://github.com/python/cpython/commit/db4a157c790479710a1a840d7937c5c815a6f8b6
https://github.com/python/cpython/commit/aaf850fd333cd89e9aada03d92aaa788a6cb1bb8
https://github.com/python/cpython/commit/71f2e02a52d47417a6fd69f456346cd8aa7aca98
https://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851f
https://github.com/python/cpython/commit/274de100bbf4345bd0c23ef5b446722e9e636908
https://github.com/python/cpython/commit/12dcbd74d3563016a8cb8c47e4898889f34f74dd
https://github.com/python/cpython/commit/0adb386f6e68eb2e73d32e19f235d012df009528
Details
Published: 2026-06-23
Updated: 2026-08-18
Risk Information
CVSS v2
Base Score: 4.6
Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:C/A:N
Severity: Medium
CVSS v3
Base Score: 5.5
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Severity: Medium
CVSS v4
Base Score: 4.1
Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Severity: Medium
EPSS
EPSS: 0.00127