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Advisory record · GHSA-g9pc-8g42-g6vq

RoadRunner is at risk of HTTP Request/Response Smuggling through vulnerable dependency

CVSS 9.1 CriticalCriticalEPSS 0.0084 · 58th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

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.

PackageEcosystemAffectedFixed in
spiral/roadrunnerPackagist<2025.1.02025.1.0
Identifiers
GHSA-g9pc-8g42-g6vq · BIT-golang-2025-22871 · CVE-2025-22871 · GO-2025-3563 · PKSA-xbp4-qwr2-cbjj
Weakness (CWE)
CWE-444 · CWE-1395
Tags
Published
8 Apr 2025
Updated
10 Sept 2026

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

ScoreRatingCVSSVectorSource
9.1 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N 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

  1. 31 Oct 2026, 14:03 UTC First seen by agentprime
  2. 31 Oct 2026, 14:03 UTC Confirmed by OSV

Sources

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.