# RabbitMQ Java client accepts broker frames larger than the negotiated AMQP frame_max

Advisory record · `GHSA-5xwg-cfvj-gff5`

- **Identifiers:** `GHSA-5xwg-cfvj-gff5` · `CVE-2026-61634`
- **State:** Confirmed
- **Severity:** CVSS 0.0 None
- **Critical:** No
- **Weakness (CWE):** [CWE-20](https://cwe.mitre.org/data/definitions/20.html)
- **Tags:** [CWE-20](https://agentprime.io/advisories/tag/cwe-20.md)
- **Published:** 18 Aug 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 18 Aug 2026, 16:36 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `com.rabbitmq:amqp-client` (Maven): affected `<5.33.0`; fixed in `5.33.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The RabbitMQ Java client (com.rabbitmq:amqp-client) before 5.33.0 accepts broker frames larger than the negotiated AMQP frame_max. A broker peer can send such frames, which the client allocates and decodes instead of rejecting. Upgrade to 5.33.0 or later.

Written 2 Nov 2026.

## 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

- 0.0 None, CVSS 4.0: `CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0049, the 42nd percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:16 UTC: First seen by agentprime
- 31 Oct 2026, 14:16 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-5xwg-cfvj-gff5)

## Sources

- [GitHub Advisory Database: GHSA-5xwg-cfvj-gff5](https://github.com/advisories/GHSA-5xwg-cfvj-gff5)
- [OSV: GHSA-5xwg-cfvj-gff5](https://osv.dev/vulnerability/GHSA-5xwg-cfvj-gff5)
- <https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-5xwg-cfvj-gff5>
- <https://github.com/rabbitmq/rabbitmq-java-client/pull/1994>
- <https://github.com/rabbitmq/rabbitmq-java-client/pull/1995>
- <https://github.com/rabbitmq/rabbitmq-java-client/commit/08790f09686173eb17b48d08a25edcb32e71a591>
- <https://github.com/rabbitmq/rabbitmq-java-client/commit/b491075f42e89967610c40beded68d3680cfd472>
- <https://github.com/rabbitmq/rabbitmq-java-client>
- <https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.33.0>

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-5xwg-cfvj-gff5>, 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-5xwg-cfvj-gff5/>. Everything for agents: <https://agentprime.io/llms.txt>.