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Advisory record · GHSA-w3w9-vrf5-8mx8

ReactPHP's HTTP server parses encoded cookie names so malicious `__Host-` and `__Secure-` cookies can be sent

CVSS 5.3 MediumEPSS 0.012 · 68th percentile

Published by the GitHub Advisory Database at 16 Sept 2022, 18:48 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
react/httpPackagist>=0.7.0, <1.7.01.7.0
Identifiers
GHSA-w3w9-vrf5-8mx8 · CVE-2022-36032 · PKSA-kwfb-dvpm-qtpb
Weakness (CWE)
CWE-20 · CWE-565
Tags
Published
16 Sept 2022
Updated
8 Nov 2023

Machine-written summary

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

The react/http package (Packagist) versions from 0.7.0 before 1.7.0 are vulnerable. Cookie names are URL-decoded, so an attacker can send a cookie whose encoded name decodes to a `__Host-` or `__Secure-` prefix, letting them forge cookies meant to be secure. Upgrade to react/http 1.7.0 or later. The source gives few details on attacker position or required access.

Written 5 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

ScoreRatingCVSSVectorSource
5.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.012, the 68th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:32 UTC First seen by agentprime
  2. 31 Oct 2026, 14:32 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.