CVE-2026-5223

Crates in third party registries can override the cached source of other crates

CVE-2026-5223 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-5223, released May 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.3

Low

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0029

22nd percentile

Cargo incorrectly handled symlinks inside of crate tarballs downloaded from third-party registries, allowing a malicious crate to override the source code of another crate from the same registry. The severity of the vulnerability is **medium** for users of third-party registries. Users of crates.io are **not affected**, as crates.io forbids uploading crates containing any symlink.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
rust-cargo · Debian 14	0.91.0-3	DEBIAN-CVE-2026-5223	May 25, 2026
rustc · Debian 13.5 (trixie)	1.85.1+dfsg1-1+deb13u1	DEBIAN-CVE-2026-5223	May 25, 2026
rustc · Debian 14	1.95.0+dfsg1-2	DEBIAN-CVE-2026-5223	May 25, 2026

Details

Published
May 25, 2026
Weakness
UNIX Symbolic Link (Symlink) Following
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-5223

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