Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Centrifugal | Centrifugo | < 6.7.0 |
Related Weaknesses (CWE)
References
- https://github.com/centrifugal/centrifugo/security/advisories/GHSA-j77h-rr39-c55ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-32301?
CVE-2026-32301 is a vulnerability with a CVSS score of 9.3 (CRITICAL). 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 ...
How severe is CVE-2026-32301?
CVE-2026-32301 has been rated CRITICAL with a CVSS base score of 9.3/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-32301?
Check the references section above for vendor advisories and patch information. Affected products include: Centrifugal Centrifugo.