CVE-2026-32301

CRITICAL

9.3

Description

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 aud claim value that gets interpolated into the JWKS fetch URL before the token signature is verified, causing Centrifugo to make an outbound HTTP request to an attacker-controlled destination. This vulnerability is fixed in 6.7.0.

CVE Details

CVSS v3.1 Score9.3

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/13/2026

Last Modified3/18/2026

Sourcenvd

Honeypot Sightings0

Affected Products

centrifugal:centrifugo

Weaknesses (CWE)

CWE-918

References

https://github.com/centrifugal/centrifugo/security/advisories/GHSA-j77h-rr39-c552(security-advisories@github.com)

IOC Correlations

No correlations recorded

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