CVE-2026-32301 json
Centrifugo: SSRF via unverified JWT claims interpolated into dynamic JWKS endpoint URL
published 2026-03-12 7 mo ago modified 2026-06-17 4 mo ago also GHSA-j77h-rr39-c552 , GO-2026-4702 , EUVD-2026-11716
- cvss
- 9.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
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.
Patch / fix
- go github.com/centrifugal/centrifugo/v6 6.7.0
- centrifugal centrifugo 6.7.0
- govulncheck-vulndb openSUSE Leap 15.6 0.0.20260326T203309-150000.1.155.2
suse advisories SUSE-SU-2026:1135-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/centrifugal/centrifugo/security/advisories/GHSA-j77h-rr39-c552 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
| GitHub | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/centrifugal/centrifugo/v6 | <6.7.0 |
6.7.0 |
| go | github.com/centrifugal/centrifugo | <=2.4.0 all versions |
no fix listed |
| go | github.com/centrifugal/centrifugo/v3 | <=3.2.3 all versions |
no fix listed |
| go | github.com/centrifugal/centrifugo/v4 | <=4.1.5 all versions |
no fix listed |
| go | github.com/centrifugal/centrifugo/v5 | <=5.4.9 all versions |
no fix listed |
Affected products
- centrifugal centrifugo
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
github.com
/centrifugal/centrifugo/security/advisories/GHSA-j77h-rr39-c552
web, exploit, mitigation, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-32301
advisory
-
github.com
/centrifugal/centrifugo
package
-
pkg.go.dev
/vuln/GO-2026-4702
web
Sources
- CVE List CVE-2026-32301
- GitHub Advisory GHSA-j77h-rr39-c552
- NVD CVE-2026-32301
- OSV GO-2026-4702
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