{"id":"UBUNTU-CVE-2026-109425","details":"Tink-go (tink-crypto/tink-go) through 2.8.0 contains an input-validation vulnerability where keyset.NewHandleWithNoSecrets() and ReadWithNoSecrets() skip the structural Validate() step before constructing a keyset.Handle, allowing malformed public or no-secret keysets that violate Tink's keyset invariants to be accepted. Attackers can supply a malformed keyset, such as one with an enabled public key lacking a valid primary key or a DESTROYED key with no KeyData, causing inconsistent downstream validation where functions like jwt.JWKSetFromPublicKeysetHandle() process the invalid handle and produce a JWK set, potentially misleading applications that rely on successful handle construction as proof of keyset integrity.","modified":"2026-10-17T12:59:49.786132560Z","published":"2026-10-12T20:17:00Z","upstream":["CVE-2026-109425"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-109425"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-109425"},{"type":"REPORT","url":"https://github.com/tink-crypto/tink-go/issues/68"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/tink-go-keyset-validation-bypass-via-newhandlewithnosecrets"}],"affected":[{"package":{"name":"golang-github-tink-crypto-tink-go","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/golang-github-tink-crypto-tink-go?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.0-1","2.7.0-3"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-tink-crypto-tink-go-dev","binary_version":"2.7.0-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109425.json"}},{"package":{"name":"golang-github-tink-crypto-tink-go","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/golang-github-tink-crypto-tink-go?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.0-1","2.5.0-1","2.5.0-3","2.6.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-tink-crypto-tink-go-dev","binary_version":"2.6.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109425.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}