CVE-2026-62963

Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.4, Centrifugo unidirectional WebSocket transport with uniwebsocket.compression enabled enforced uniwebsocket.messagesizelimit against compressed wire-frame length in internal/websocket/conn.go advanceFrame, but...

CVE-2026-49998

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...

CVE-2026-62963 Centrifugo: Decompression bomb DoS via permessage-deflate in unidirectional WebSocket transport

Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.4, Centrifugo unidirectional WebSocket transport with uniwebsocket.compression enabled enforced uniwebsocket.messagesizelimit against compressed wire-frame length in internal/websocket/conn.go advanceFrame, but...

CVE-2026-62963 Centrifugo: Decompression bomb DoS via permessage-deflate in unidirectional WebSocket transport

Centrifugo is an open-source scalable real-time messaging server. Prior to 6.8.4, Centrifugo unidirectional WebSocket transport with uniwebsocket.compression enabled enforced uniwebsocket.messagesizelimit against compressed wire-frame length in internal/websocket/conn.go advanceFrame, but...

CVE-2026-62963

CVE-2026-62963 affects Centrifugo prior to 6.8.4. The unidirectional WebSocket transport with uni_websocket.compression enabled did not cap output after decompression in ReadMessage (internal/websocket/conn.go advanceFrame), allowing unauthenticated requests to /connection/uni_websocket to trigge...

CVE-2026-49998

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...

CVE-2026-49998

CVE-2026-49998 describes a cross-issuer JWT authentication bypass in Centrifugo prior to v6.8.1 caused by the JWKS cache and singleflight lookup being keyed only by the JWT header kid. The JWKS URL is resolved later from tokenVars to a per-tenant endpoint, but caches (and TTL) and the in-flight f...

CVE-2026-49998 Centrifugo: Dynamic JWKS key cache keyed only by `kid` allows cross-issuer JWT authentication bypass

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...

GO-2026-5872 Centrifugo's dynamic JWKS key cache keyed only by `kid` allows cross-issuer JWT authentication bypass in github.com/centrifugal/centrifugo

Centrifugo's dynamic JWKS key cache keyed only by kid allows cross-issuer JWT authentication bypass in github.com/centrifugal/centrifugo...

CVE-2026-49998

creationtimestamp| type| source ---|---|--- 2026-07-01 22:35:18+00:00| published-proof-of-concept| https://github.com/centrifugal/centrifugo/security/advisories/GHSA-g6vg-wj8f-48cj 2026-07-16 23:28:09+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mqsf7jmkdr2m...

GHSA-G6VG-WJ8F-48CJ Centrifugo's dynamic JWKS key cache keyed only by `kid` allows cross-issuer JWT authentication bypass

Summary Centrifugo's dynamic JWKS endpoint feature can verify a JWT for one allowed issuer using a public key cached from another allowed issuer. The JWKS cache and singleflight lookup are keyed only by the JWT header kid, not by the resolved JWKS endpoint, issuer, audience, or other trust-domain...

PT-2026-54774

Name of the Vulnerable Software and Affected Versions Centrifugo affected versions not specified Description Centrifugo contains a cross-tenant JWT authentication bypass when using dynamic JWKS JSON Web Key Set endpoints. The issue occurs because the JWKS cache and singleflight lookup are keyed...

Server-Side Request Forgery (SSRF)

github.com/centrifugal/centrifug is vulnerable to Server-Side Request Forgery SSRF. The vulnerability is due to improper handling of dynamic JWKS endpoint template variables, which allows an unauthenticated attacker to craft a malicious JWT with manipulated iss or aud claims to force Centrifugo t...

SUSE CVE-2026-32301

Centrifugo is an open-source scalable real-time messaging server. Prior to 6.7.0, Centrifugo is vulnerable to Server-Side Request Forgery SSRF when configured with a dynamic JWKS endpoint URL using template variables e.g. tenant. An unauthenticated attacker can craft a JWT with a malicious iss or...

GO-2026-4703 Centrifugo's InsecureSkipTokenSignatureVerify flag silently disables JWT verification with no warning in github.com/centrifugal/centrifugo

Centrifugo's InsecureSkipTokenSignatureVerify flag silently disables JWT verification with no warning in github.com/centrifugal/centrifugo...

GO-2026-4702 Centrifugo: SSRF via unverified JWT claims interpolated into dynamic JWKS endpoint URL in github.com/centrifugal/centrifugo

Centrifugo: SSRF via unverified JWT claims interpolated into dynamic JWKS endpoint URL in github.com/centrifugal/centrifugo...

CVE-2026-32301

Centrifugo is an open-source scalable real-time messaging server. Prior to 6.7.0, Centrifugo is vulnerable to Server-Side Request Forgery SSRF when configured with a dynamic JWKS endpoint URL using template variables e.g. tenant. An unauthenticated attacker can craft a JWT with a malicious iss or...

GHSA-Q926-C743-49QJ Centrifugo's InsecureSkipTokenSignatureVerify flag silently disables JWT verification with no warning

Summary Centrifugo supports a configuration flag insecureskiptokensignatureverify that completely disables JWT signature verification. When enabled, Centrifugo accepts any JWT token regardless of signature validity — including tokens signed with wrong keys, random signatures, or no signature at...

Centrifugo's InsecureSkipTokenSignatureVerify flag silently disables JWT verification with no warning

Summary Centrifugo supports a configuration flag insecureskiptokensignatureverify that completely disables JWT signature verification. When enabled, Centrifugo accepts any JWT token regardless of signature validity — including tokens signed with wrong keys, random signatures, or no signature at...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the fetchKey function. An attacker can cause the server to make arbitrary HTTP requests to attacker-controlled destinations by crafting a JWT with malicious claim values that are interpolated into th...