CVE-2026-32301
Centrifugo: SSRF via unverified JWT claims interpolated into dynamic JWKS endpoint URL
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.
INFO
Published Date :
March 12, 2026, 9:19 p.m.
Last Modified :
March 12, 2026, 9:19 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-32301
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Centrifugo to version 6.7.0 or later.
- Avoid using dynamic JWKS endpoint URLs with template variables.
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CVE-2026-32301 vulnerability anywhere in the article.