Improper Verification of Cryptographic Signature Affecting github.com/centrifugal/centrifugo/internal/jwks package, versions >=0.0.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published3 Jul 2026
- disclosed1 Jul 2026
- creditUnknown
Introduced: 1 Jul 2026
CVE-2026-49998 (opens in a new tab)How to fix?
There is no fixed version for github.com/centrifugal/centrifugo/internal/jwks.
Overview
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the JWKS key caching process. An attacker can gain unauthorized access to another issuer or tenant's resources by crafting a valid token for one allowed issuer and exploiting the cache's reliance on the kid value alone, provided both issuers use the same kid and the attacker's key is cached first. This allows bypassing intended issuer or audience separation in multi-tenant deployments using dynamic JWKS endpoints.