# Traefik: respondingTimeouts.readTimeout is not applied to HTTP/3, leaving slow-body uploads unbounded Advisory record · `GHSA-7ghq-v6jf-g56c` - **Identifiers:** `GHSA-7ghq-v6jf-g56c` · `CVE-2026-88012` · `CVE-2026-88878` · `GO-2026-6454` - **State:** Confirmed - **Severity:** CVSS 6.9 Medium - **Critical:** No - **Weakness (CWE):** [CWE-770](https://cwe.mitre.org/data/definitions/770.html) - **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md) - **Published:** 10 Sept 2026 - **Updated:** 17 Sept 2026 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 10 Sept 2026, 20:27 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Affected packages - `github.com/traefik/traefik/v2` (Go): affected `>=2.8.2, <2.11.56`; fixed in `2.11.56` - `github.com/traefik/traefik/v3` (Go): affected `>=3.0.0, <3.7.12`; fixed in `3.7.12` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > Traefik v2 (>=2.8.2, <2.11.56) and Traefik v3 (>=3.0.0, <3.7.12) do not apply the respondingTimeouts readTimeout setting to HTTP/3 requests, so request bodies sent over HTTP/3 have no time bound. An unauthenticated client can send a slow request body and hold the request and its upstream connection open for as long as it chooses. Upgrade to Traefik v2.11.56 or v3.7.12, which are the fixed versions; no workaround is listed. Written 1 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 - 6.9 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`, from CNA (VulnCheck) - **CISA KEV:** Not listed. - **EPSS:** 0.0052, the 44th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 27 Aug 2026, 07:50 UTC: [Published by the maintainers as a GitHub repository advisory](https://github.com/traefik/traefik/security/advisories/GHSA-7ghq-v6jf-g56c) - 31 Oct 2026, 14:13 UTC: First seen by agentprime - 31 Oct 2026, 14:13 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-7ghq-v6jf-g56c) ## Sources - [GitHub Advisory Database: GHSA-7ghq-v6jf-g56c](https://github.com/advisories/GHSA-7ghq-v6jf-g56c) - [OSV: GHSA-7ghq-v6jf-g56c](https://osv.dev/vulnerability/GHSA-7ghq-v6jf-g56c) - - - - - - - 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 (), 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: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .