CVE-2026-0864
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.
02 / AFFECTED SOFTWARE
Affected packages
247 explicit affected versions
229 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
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.
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.
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.
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.
05 / REFERENCES
Further evidence
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0864.json
- https://github.com/python/cpython
- 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/[email protected]/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/
- https://nvd.nist.gov/vuln/detail/CVE-2026-0864