This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-17084 →
DEBIAN-CVE-2026-17084
The "stringprep" module didn't process characters from RFC 3454 tables B.2 or B.3 correctly: the latest Unicode codepoint attributes were used inste...
Original description
The description as published by the source.
The "stringprep" module didn't process characters from RFC 3454 tables B.2 or B.3 correctly: the latest Unicode codepoint attributes were used instead of the specified Unicode 3.2.0. This behavior would cause mismatches when processing domain names using IDNA 2003 (the "idna" codec) and the in_table_b2() function of the "stringprep" module. This only affects domain names containing characters that were not previously registered or had their Unicode attributes such as case-folding behavior updated since Unicode 3.2.0.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
pypy3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
pypy3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
pypy3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
python3.11
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11.2-6+deb12u9"}]}]
Debian:13
python3.13
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
python3.13
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
python3.14
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.7-3"}]}]
Debian:14
python3.15
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.15.0~rc2-1"}]}]
References
- advisory security-tracker.debian.org