CVE-2026-0864
Configuration Injection via Carriage Return (\r) in write() method
Using CPython by Python Software Foundation?
Get instant alerts when new vulnerabilities affect CPython - before attackers find them.
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
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://github.com/python/cpython/pull/151559
- https://mail.python.org/archives/list/[email protected]/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/
- https://github.com/python/cpython/issues/143927
- https://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851f
- https://github.com/python/cpython/commit/0adb386f6e68eb2e73d32e19f235d012df009528
References (10)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- HIGH
- Availability
- NONE
Quick Info
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.