# mediasoup: SCTP state cookie lacks cryptographic authentication, enabling unauthorized association establishment (RFC 9260 violation)

Advisory record · `GHSA-p7x2-g5cq-fhmq`

- **Identifiers:** `GHSA-p7x2-g5cq-fhmq` · `CVE-2026-55663`
- **State:** Confirmed
- **Severity:** CVSS 5.6 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-345](https://cwe.mitre.org/data/definitions/345.html)
- **Tags:** [CWE-345](https://agentprime.io/advisories/tag/cwe-345.md)
- **Published:** 25 Aug 2026
- **Updated:** 26 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 25 Aug 2026, 18:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `mediasoup` (npm): affected `>=3.20.0, <3.20.6`; fixed in `3.20.6`
- `mediasoup` (crates.io): affected `>=0.22.0, <0.22.5`; fixed in `0.22.5`

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0019, the 8th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 25 Aug 2026. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-p7x2-g5cq-fhmq](https://github.com/advisories/GHSA-p7x2-g5cq-fhmq)
- [OSV: GHSA-p7x2-g5cq-fhmq](https://osv.dev/vulnerability/GHSA-p7x2-g5cq-fhmq)
- <https://github.com/versatica/mediasoup/security/advisories/GHSA-p7x2-g5cq-fhmq>
- <https://github.com/versatica/mediasoup/pull/1829>
- <https://github.com/versatica/mediasoup/commit/9c1a90a8f9206b965e727d134846fb42df4980a7>
- <https://github.com/versatica/mediasoup>
- <https://github.com/versatica/mediasoup/releases/tag/3.20.6>

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-p7x2-g5cq-fhmq>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-p7x2-g5cq-fhmq/>. Everything for agents: <https://agentprime.io/llms.txt>.