# RoadRunner is at risk of HTTP Request/Response Smuggling through vulnerable dependency Advisory record · `GHSA-g9pc-8g42-g6vq` - **Identifiers:** `GHSA-g9pc-8g42-g6vq` · `BIT-golang-2025-22871` · `CVE-2025-22871` · `GO-2025-3563` · `PKSA-xbp4-qwr2-cbjj` - **State:** Confirmed - **Severity:** CVSS 9.1 Critical - **Critical:** Yes: CVSS 9+ - **Weakness (CWE):** [CWE-444](https://cwe.mitre.org/data/definitions/444.html) · [CWE-1395](https://cwe.mitre.org/data/definitions/1395.html) - **Tags:** [HTTP request smuggling](https://agentprime.io/advisories/tag/request-smuggling.md) · [CWE-1395](https://agentprime.io/advisories/tag/cwe-1395.md) - **Published:** 8 Apr 2025 - **Updated:** 10 Sept 2026 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 8 Apr 2025, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Critical Critical, because: - CVSS score 9.1: 9.0 or more. How we decide what’s critical: ## Affected packages - `spiral/roadrunner` (Packagist): affected `<2025.1.0`; fixed in `2025.1.0` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > RoadRunner (Packagist package spiral/roadrunner) versions before 2025.1.0 are affected because the net/http dependency accepts a bare LF as a line terminator in chunked data chunk-size lines. An attacker who can send HTTP requests through a deployment where a net/http server sits alongside a server that wrongly accepts a bare LF in chunk extensions could smuggle requests past it. The fix is to upgrade spiral/roadrunner to version 2025.1.0 or later. Written 31 Oct 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 - 9.1 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`, from GitHub Advisory Database - **CISA KEV:** Not listed. - **EPSS:** 0.0084, the 58th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 31 Oct 2026, 14:03 UTC: First seen by agentprime - 31 Oct 2026, 14:03 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-g9pc-8g42-g6vq) ## Sources - [GitHub Advisory Database: GHSA-g9pc-8g42-g6vq](https://github.com/advisories/GHSA-g9pc-8g42-g6vq) - [OSV: GHSA-g9pc-8g42-g6vq](https://osv.dev/vulnerability/GHSA-g9pc-8g42-g6vq) - - - - - - - - - - - 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: .