CVE-2026-23991Medium· 5.9▾ SunlitA denial of service flaw has been discovered in go-tuf. 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 o…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 32.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.5%
0.5% → 0.6%
Last analysed / modified upstream
A denial of service flaw has been discovered in go-tuf. 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.
github.com/theupdateframework/go-tuf/v2: go-tuf client DoS via malformed server response — rated Moderate by Red Hat. Released 2026-01-22, updated 2026-09-23.
Affected:
No fix planned:
Fix deferred
Workarounds / mitigations:
Affected packages:
github.com/theupdateframework/go-tuf/v2 < 2.3.1Patched in:
github.com/theupdateframework/go-tuf/v2 2.3.1Connected by shared product, vendor, weakness, or advisory.
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