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4.1 Medium

CVE-2026-0864 When using the "configparser" module to write configuration files containing multi-line text values with carriage return…

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 products and versions

Product Affected versions Fixed in
CPython 3.15 3.15.0a1 → < 3.15.0b4 3.15.0b4
CPython 3.14 3.14.0 → < 3.14.7 3.14.7
CPython 3.13 3.13.0 → < 3.13.15 3.13.15
CPython 3.12 3.12.0 → < 3.12.14 3.12.14
CPython 3.11 3.11.0 → < 3.11.16 3.11.16
CPython 3.10 earliest → < 3.10.21 3.10.21

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