---
title: "CVE-2025-22871: RoadRunner is at risk of HTTP Request/Response Smuggling through vulnerable dependency"
url: https://erroneo.us/security/cve/CVE-2025-22871/
description: "CVE-2025-22871 (spiral/roadrunner (Composer (PHP))): The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-04-08
date_modified: 2026-05-13
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-22871"
kev: false
cvss: 9.1
epss: 0.00826
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-22871: RoadRunner is at risk of HTTP Request/Response Smuggling through vulnerable dependency

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.8% , percentile 57: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 57% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes spiral/roadrunner (Composer (PHP)) < 2025.1.0, fixed in 2025.1.0 . Check your lockfile, including transitive dependencies.

## What it is

The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext.

## Affected packages

- Composer (PHP) `spiral/roadrunner` < 2025.1.0 → fixed: 2025.1.0

## Affected products (CVE record)

- Go standard library net/http/internal: < 1.23.8, 1.24.0-0 < 1.24.2

## Severity

- CISA-ADP CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.83% probability of exploitation activity in the next 30 days; percentile 57.

## Sources

- [GitHub Advisory GHSA-g9pc-8g42-g6vq](https://github.com/advisories/GHSA-g9pc-8g42-g6vq)
- [CVE.org record CVE-2025-22871](https://www.cve.org/CVERecord?id=CVE-2025-22871)
- [NVD entry CVE-2025-22871](https://nvd.nist.gov/vuln/detail/CVE-2025-22871)
- [go.dev](https://go.dev/cl/652998)
- [go.dev](https://go.dev/issue/71988)
- [groups.google.com](https://groups.google.com/g/golang-announce/c/Y2uBTVKjBQk)
- [pkg.go.dev](https://pkg.go.dev/vuln/GO-2025-3563)
- [openwall.com](http://www.openwall.com/lists/oss-security/2025/04/04/4)
- [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/html/ssa-783943.html)
- [github.com](https://github.com/roadrunner-server/roadrunner/issues/2166)
- [github.com](https://github.com/roadrunner-server/roadrunner/commit/f269279ee87d0b88127741cad1042389af7605fa)
- [github.com](https://github.com/roadrunner-server/roadrunner/releases/tag/v2025.1.0)

---
Source page: https://erroneo.us/security/cve/CVE-2025-22871/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt