CVE-2026-49998: high-severity vulnerability in centrifugal centrifugo
Centrifugo: Dynamic JWKS key cache keyed only by `kid` allows cross-issuer JWT authentication bypass
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.2%
Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.1, Centrifugo dynamic JWKS endpoint verification could reuse a key for one allowed issuer to verify a JWT for another allowed issuer because the JWKS cache and singleflight lookup were keyed only by JWT header kid, not by the resolved JWKS endpoint, issuer, audience, or trust-domain namespace, affecting client.token.jwks_public_endpoint, client.subscription_token.jwks_public_endpoint, internal/jwks/cache.go, and internal/jwks/manager.go. This issue is fixed in version 6.8.1.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Affected products
centrifugal · centrifugoRelated CVEs — centrifugal centrifugo
In the same product, most dangerous first.
CVE-2026-71485CRITICALCentrifugo: Client-forgeable headers emulation lets any client spoof headers forwarded to proxy backendsEPSS 0.6%CVE-2026-62963HIGHCentrifugo: Decompression bomb DoS via permessage-deflate in unidirectional WebSocket transportEPSS 0.5%CVE-2026-32301CRITICALCentrifugo: SSRF via unverified JWT claims interpolated into dynamic JWKS endpoint URLEPSS 0.3%