CVE-2026-40946

CRITICAL

Oxia: OIDC token audience validation bypass via SkipClientIDCheck

Title source: cna
STIX 2.1

Description

Oxia is a metadata store and coordination system. Prior to 0.16.2, the OIDC authentication provider unconditionally sets SkipClientIDCheck: true in the go-oidc verifier configuration, disabling the standard audience (aud) claim validation at the library level. This allows tokens issued for unrelated services by the same OIDC issuer to be accepted by Oxia. This vulnerability is fixed in 0.16.2.

References (1)

Core 1
Core References

Scores

CVSS v4 9.2
EPSS 0.0026
EPSS Percentile 16.6%
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-287
Status published
Products (2)
oxia-db/oxia 0 - 0.16.2Go
oxia-db/oxia < 0.16.2
Published Apr 21, 2026
Tracked Since Apr 22, 2026