CVE-2026-27489

Name	CVE-2026-27489
Description	Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, a path traversal vulnerability via symlink allows to read arbitrary files outside model or user-provided directory. This issue has been patched in version 1.21.0.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1133190

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
onnx (PTS)	bullseye	1.7.0+dfsg-3	vulnerable
	bookworm	1.12.0-2	vulnerable
	trixie	1.17.0-3	vulnerable
	forky, sid	1.20.0-4	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
onnx	source	(unstable)	(unfixed)			1133190

Notes

[trixie] - onnx <no-dsa> (Minor issue)
[bookworm] - onnx <no-dsa> (Minor issue)
https://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73
Fixed by: https://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cb