CVE-2026-40946: CWE-287: Improper Authentication in oxia-db oxia
CVE-2026-40946 is a critical improper authentication vulnerability in oxia versions prior to 0. 16. 2. The issue arises because the OIDC authentication provider sets SkipClientIDCheck to true, disabling audience claim validation and allowing tokens intended for other services from the same OIDC issuer to be accepted by oxia. This flaw could lead to unauthorized access. The vulnerability is fixed in version 0. 16. 2. No known exploits are reported in the wild.
AI Analysis
Technical Summary
Oxia, a metadata store and coordination system, had a vulnerability in its OIDC authentication provider before version 0.16.2. Specifically, the configuration unconditionally set SkipClientIDCheck to true in the go-oidc verifier, which disables the standard audience (aud) claim validation. This means that oxia would accept tokens issued for unrelated services by the same OIDC issuer, potentially allowing unauthorized access. The vulnerability is identified as CWE-287 (Improper Authentication) and has a CVSS 4.0 score of 9.2, indicating critical severity. The issue is resolved in oxia version 0.16.2.
Potential Impact
The vulnerability allows acceptance of OIDC tokens issued for other services by the same issuer, bypassing intended audience restrictions. This can lead to unauthorized access to oxia services, potentially compromising metadata and coordination functions. No known exploits have been reported in the wild.
Mitigation Recommendations
Upgrade oxia to version 0.16.2 or later, where the vulnerability is fixed by properly validating the audience claim in OIDC tokens. Since no official patch link or vendor advisory is provided, users should verify the upgrade from the official oxia project sources. Patch status is not yet confirmed via vendor advisory; check official oxia communications for the latest remediation guidance.
CVE-2026-40946: CWE-287: Improper Authentication in oxia-db oxia
Description
CVE-2026-40946 is a critical improper authentication vulnerability in oxia versions prior to 0. 16. 2. The issue arises because the OIDC authentication provider sets SkipClientIDCheck to true, disabling audience claim validation and allowing tokens intended for other services from the same OIDC issuer to be accepted by oxia. This flaw could lead to unauthorized access. The vulnerability is fixed in version 0. 16. 2. No known exploits are reported in the wild.
CVSS v4.0
Score 9.2critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Oxia, a metadata store and coordination system, had a vulnerability in its OIDC authentication provider before version 0.16.2. Specifically, the configuration unconditionally set SkipClientIDCheck to true in the go-oidc verifier, which disables the standard audience (aud) claim validation. This means that oxia would accept tokens issued for unrelated services by the same OIDC issuer, potentially allowing unauthorized access. The vulnerability is identified as CWE-287 (Improper Authentication) and has a CVSS 4.0 score of 9.2, indicating critical severity. The issue is resolved in oxia version 0.16.2.
Potential Impact
The vulnerability allows acceptance of OIDC tokens issued for other services by the same issuer, bypassing intended audience restrictions. This can lead to unauthorized access to oxia services, potentially compromising metadata and coordination functions. No known exploits have been reported in the wild.
Mitigation Recommendations
Upgrade oxia to version 0.16.2 or later, where the vulnerability is fixed by properly validating the audience claim in OIDC tokens. Since no official patch link or vendor advisory is provided, users should verify the upgrade from the official oxia project sources. Patch status is not yet confirmed via vendor advisory; check official oxia communications for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-15T20:40:15.519Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e7f01d19fe3cd2cdfcab4d
Added to database: 4/21/2026, 9:46:05 PM
Last enriched: 4/29/2026, 11:12:22 AM
Last updated: 6/5/2026, 8:19:03 PM
Views: 112
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