Unrated severityNVD Advisory· Published Jun 23, 2026· Updated Jun 23, 2026
Configuration Injection via Carriage Return (\r) in write() method
CVE-2026-0864
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.
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Affected products
1Patches
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References
4- github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851fmitrepatch
- github.com/python/cpython/pull/151559mitrepatch
- mail.python.org/archives/list/security-announce@python.org/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/mitrevendor-advisory
- github.com/python/cpython/issues/143927mitreissue-tracking
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