# Denial of service in quinn-proto when using \`Endpoint::retry()\`

Advisory record · `GHSA-vr26-jcq5-fjj8`

- **Identifiers:** `GHSA-vr26-jcq5-fjj8` · `CVE-2024-45311` · `RUSTSEC-2024-0373`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-670](https://cwe.mitre.org/data/definitions/670.html)
- **Tags:** [CWE-670](https://agentprime.io/advisories/tag/cwe-670.md)
- **Published:** 3 Sept 2024
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 3 Sept 2024, 20:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `quinn-proto` (crates.io): affected `>=0.11.0, <0.11.7`; fixed in `0.11.7`

## Machine-written summary

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

> Versions 0.11.0 up to but not including 0.11.7 of the quinn-proto crate are affected. A server that calls retry() on an incoming connection can be made to panic, either when refuse() or ignore() is called on the resulting connection after a duplicate initial packet arrives, or when accepting after certain initial packets fail to decrypt or exhaust connection IDs. The result is denial of service against an internet-facing server. Upgrade to quinn-proto 0.11.7 or later.

Written 8 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0057, the 47th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:17 UTC: First seen by agentprime
- 31 Oct 2026, 15:17 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-vr26-jcq5-fjj8)

## Sources

- [GitHub Advisory Database: GHSA-vr26-jcq5-fjj8](https://github.com/advisories/GHSA-vr26-jcq5-fjj8)
- [OSV: GHSA-vr26-jcq5-fjj8](https://osv.dev/vulnerability/GHSA-vr26-jcq5-fjj8)
- <https://github.com/quinn-rs/quinn/security/advisories/GHSA-vr26-jcq5-fjj8>
- <https://nvd.nist.gov/vuln/detail/CVE-2024-45311>
- <https://github.com/quinn-rs/quinn/commit/e01609ccd8738bd438d86fa7185a0f85598cb58f>
- <https://github.com/quinn-rs/quinn>
- <https://github.com/quinn-rs/quinn/blob/bb02a12a8435a7732a1d762783eeacbb7e50418e/quinn-proto/src/endpoint.rs#L213>
- <https://rustsec.org/advisories/RUSTSEC-2024-0373.html>

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-vr26-jcq5-fjj8>, 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-vr26-jcq5-fjj8/>. Everything for agents: <https://agentprime.io/llms.txt>.