CVE-2026-40946
OIDC audience validation bypass in Oxia before 0.16.2.
Is CVE-2026-40946 being exploited?
Not confirmed. CVE-2026-40946 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.26% probability of exploitation in the next 30 days.
How severe is CVE-2026-40946?
CVE-2026-40946 is rated Critical with a CVSS score of 9.2. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-40946?
Yes. A fix has been recorded for CVE-2026-40946. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-40946 affect?
CVE-2026-40946 affects Oxia. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-40946?
Upgrade to 0.16.2+; revalidate OIDC audience checks.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Auth bypass: attacker can impersonate users and access Oxia metadata via tokens from the same OIDC issuer.
Immediate action required
- affected< 0.16.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.