Hi,

The following vulnerability was published for pypy3.

CVE-2026-0864[0]:
| 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.

https://mail.python.org/archives/list/security-announce@python.org/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/
https://github.com/python/cpython/issues/143927
https://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851f (main)

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-0864
https://www.cve.org/CVERecord?id=CVE-2026-0864

Please adjust the affected versions in the BTS as needed.