CVE-2026-0864
Low
No strong exploitation signal.
CVSS base
5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS — probability of exploitation (30 days)
0.1%
2.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-74
Published 2026-06-23 · modified 2026-08-18
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | H | High |
| Availability | N | None |
Timeline
- 2026-06-23 — Published (NVD)
- 2026-08-18 — Last modified (NVD)
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.
Affected
References
- https://github.com/python/cpython/commit/0adb386f6e68eb2e73d32e19f235d012df009528
- https://github.com/python/cpython/commit/12dcbd74d3563016a8cb8c47e4898889f34f74dd
- https://github.com/python/cpython/commit/274de100bbf4345bd0c23ef5b446722e9e636908
- https://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851f
- https://github.com/python/cpython/commit/71f2e02a52d47417a6fd69f456346cd8aa7aca98
- https://github.com/python/cpython/commit/aaf850fd333cd89e9aada03d92aaa788a6cb1bb8
- https://github.com/python/cpython/commit/db4a157c790479710a1a840d7937c5c815a6f8b6
- https://github.com/python/cpython/issues/143927
- https://github.com/python/cpython/pull/151559
- https://mail.python.org/archives/list/security-announce@python.org/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/