# Centrifugo: SSRF via unverified JWT claims interpolated into dynamic JWKS endpoint URL

Advisory record · `GHSA-j77h-rr39-c552`

- **Identifiers:** `GHSA-j77h-rr39-c552` · `CVE-2026-32301` · `GO-2026-4702`
- **State:** Confirmed
- **Severity:** CVSS 9.3 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-918](https://cwe.mitre.org/data/definitions/918.html)
- **Tags:** [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.md)
- **Published:** 13 Mar 2026
- **Updated:** 27 Mar 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 13 Mar 2026, 20:03 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.3: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `github.com/centrifugal/centrifugo/v6` (Go): affected `<6.7.0`; fixed in `6.7.0`
- `github.com/centrifugal/centrifugo` (Go): affected `<=2.4.0`; no fixed version yet
- `github.com/centrifugal/centrifugo/v3` (Go): affected `<=3.2.3`; no fixed version yet
- `github.com/centrifugal/centrifugo/v4` (Go): affected `<=4.1.5`; no fixed version yet
- `github.com/centrifugal/centrifugo/v5` (Go): affected `<=5.4.9`; no fixed version yet

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.3 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0029, the 22nd percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:08 UTC: First seen by agentprime
- 31 Oct 2026, 15:08 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-j77h-rr39-c552)

## Sources

- [GitHub Advisory Database: GHSA-j77h-rr39-c552](https://github.com/advisories/GHSA-j77h-rr39-c552)
- [OSV: GHSA-j77h-rr39-c552](https://osv.dev/vulnerability/GHSA-j77h-rr39-c552)
- <https://github.com/centrifugal/centrifugo/security/advisories/GHSA-j77h-rr39-c552>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-32301>
- <https://github.com/centrifugal/centrifugo>
- <https://pkg.go.dev/vuln/GO-2026-4702>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-j77h-rr39-c552>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-j77h-rr39-c552/>. Everything for agents: <https://agentprime.io/llms.txt>.