Vulnerability DatabaseCVE-2026-0864
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CVE-2026-0864
Published:June 23, 2026
Updated:August 06, 2026
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.
Related Resources (11)
https://github.com/python/cpython/commit/db4a157c790479710a1a840d7937c5c815a6f8b6
https://github.com/python/cpython/commit/0adb386f6e68eb2e73d32e19f235d012df009528
https://github.com/python/cpython/pull/151559
https://github.com/python/cpython
https://nvd.nist.gov/vuln/detail/CVE-2026-0864
https://github.com/python/cpython/commit/71f2e02a52d47417a6fd69f456346cd8aa7aca98
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0864.json
https://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851f
https://github.com/python/cpython/issues/143927
https://github.com/python/cpython/commit/aaf850fd333cd89e9aada03d92aaa788a6cb1bb8
https://mail.python.org/archives/list/security-announce@python.org/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/
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CVSS v4
Base Score:
4.1
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
HIGH
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.2
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-74
EPSS
Base Score:
0.13