CVE-2026-23991

go-tuf affected by client DoS via malformed server response

State: Published
Severity: 5.9 Medium
Published: Jan 22, 2026
Updated: Jan 22, 2026
Reserved: Jan 19, 2026

Description

go-tuf is a Go implementation of The Update Framework (TUF). Starting in version 2.0.0 and prior to version 2.3.1, if the TUF repository (or any of its mirrors) returns invalid TUF metadata JSON (valid JSON but not well formed TUF metadata), the client will panic during parsing, causing a denial of service. The panic happens before any signature is validated. This means that a compromised repository/mirror/cache can DoS clients without having access to any signing key. Version 2.3.1 fixes the issue. No known workarounds are available.

Scores

CVSS	Score	Vector	Source
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-617 Reachable Assertion
CWE-754 Improper Check for Unusual or Exceptional Conditions

Affected Products

Product	Versions
go-tuftheupdateframework	>= 2.0.0, < 2.3.1Affected

References

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