CVE-2026-32301GHSA-J77H-RR39-C552GO-2026-4702
Centrifugo: SSRF via unverified JWT claims interpolated into dynamic JWKS endpoint URL
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.7.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: poc
- Automatable: yes
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- centrifugal centrifugo
fixed in 6.7.0
- github.com/centrifugal/centrifugo/v6Go
fixed in 6.7.0
- github.com/centrifugal/centrifugoGo
through 2.4.0
- github.com/centrifugal/centrifugo/v3Go
through 3.2.3
- github.com/centrifugal/centrifugo/v4Go
through 4.1.5
- github.com/centrifugal/centrifugo/v5Go
through 5.4.9
- github.com/centrifugal/centrifugoGo
All versions
- github.com/centrifugal/centrifugo/v3Go
All versions
- github.com/centrifugal/centrifugo/v4Go
All versions
- github.com/centrifugal/centrifugo/v5Go
All versions