CVE-2026-109425 (GCVE-0-2026-109425)
Vulnerability from cvelistv5 – Published: 2026-10-12 19:55 – Updated: 2026-10-13 16:52 X_Open Source
VLAI
EPSS
VEX
Title
Tink-go 2.8.0 Keyset Validation Bypass via NewHandleWithNoSecrets
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 15:03 UTC
CWE
- CWE-1286 - Improper Validation of Syntactic Correctness of Input
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/tink-crypto/tink-go/issues/68 | technical-descriptionexploit |
| https://www.vulncheck.com/advisories/tink-go-keys… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| tink-crypto | tink-go |
Affected:
2.0.0 , ≤ 2.8.0
(semver)
|
guessed |
Date Public
2026-09-10 00:00
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