CVE-2026-32301: Centrifugo is an open-source scalable real-time messaging server

Q: How do I fix CVE-2026-32301?

centrifugo: upgrade to 6.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-32301 being exploited?

CVE-2026-32301 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-32301 affect?

CVE-2026-32301 affects centrifugo. Severity is critical (CVSS 9.3). 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

Q: How urgent is CVE-2026-32301?

Priority 47/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.3REMOTEUPGRADE

CVE-2026-32301 is a critical-severity flaw (CVSS 9.3) affecting centrifugo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 HT

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-03-13
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: centrifugal

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-13 19:54 UTCPublished CVE record published
2026-06-17 10:35 UTCUpdated Record last modified

centrifugal centrifugo UPGRADE

Affected: < 6.7.0

Fixed in: 6.7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy centrifugo || rpm -q centrifugo || centrifugo --version

2. UPGRADE to 6.7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade centrifugo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade centrifugo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-32301?

centrifugo: upgrade to 6.7.0. Exact commands for each OS are on this page.

Is CVE-2026-32301 being exploited?

CVE-2026-32301 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-32301 affect?

CVE-2026-32301 affects centrifugo. Severity is critical (CVSS 9.3). 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

How urgent is CVE-2026-32301?

Priority 47/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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