CVE-2026-40946 json
Oxia: OIDC token audience validation bypass via SkipClientIDCheck
published 6mo ago modified 4mo ago also GHSA-fhvp-9hcj-6m33 , GO-2026-5364 , EUVD-2026-24512
- cvss
- 9.2
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 17%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/oxia-db/oxia 0.16.2
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 6mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.2 | 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 |
| CNA | 4.0 | 9.2 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/oxia-db/oxia | <0.16.2 |
0.16.2 |
Affected products
- oxia-db oxia
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/oxia-db/oxia/security/advisories/GHSA-fhvp-9hcj-6m33
web, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-40946
advisory
-
github.com
/oxia-db/oxia
package
Sources
- CVE List CVE-2026-40946
- GitHub Advisory GHSA-fhvp-9hcj-6m33
- NVD CVE-2026-40946
- OSV GO-2026-5364
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