Impacts OpenID Connect/OAuth identity providers used broadly; can disclose identity data and enable account takeover across many orgs.
CVE-2026-55982
OIDC userinfo returns identity claims without enforcing token scopes
Is CVE-2026-55982 being exploited?
Not confirmed. CVE-2026-55982 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 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-55982?
CVE-2026-55982 is rated Critical. 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-2026-55982?
Yes. A fix has been recorded for CVE-2026-55982. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-55982 affect?
CVE-2026-55982 affects OpenID Connect (OIDC) providers, OAuth 2.0 userinfo endpoints, Identity Providers (e.g., Keycloak, Auth0, Okta, Azure AD), Web apps using OIDC for authentication. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-55982?
Revoke/rotate tokens, enforce scope checks, restrict userinfo, apply vendor patch when available
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attackers with a bearer token can retrieve unauthorized identity claims, leaking PII and enabling impersonation or account takeover via userinfo endpoint.
Immediate action required
- affected1.26.2
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.