CVE-2026-32301
Centrifugo: SSRF via unverified JWT claims interpolated into dynamic JWKS endpoint URL
CVSS Score
9.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-918 |
| Vendor | centrifugal |
| Product | centrifugo |
| Published | Mar 12, 2026 |
| Last Updated | Mar 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
centrifugal / centrifugo
< 6.7.0