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Advisory record · GHSA-73m2-qfq3-56cx

Apache HttpClient disables domain checks

CVSS 7.5 HighEPSS 0.0097 · 62nd percentile

Published by the GitHub Advisory Database at 24 Apr 2025, 12:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.httpcomponents.client5:httpclient5Maven>=5.4-alpha1, <5.4.35.4.3
Identifiers
GHSA-73m2-qfq3-56cx · CVE-2025-27820
Weakness (CWE)
CWE-295
Tags
Published
24 Apr 2025
Updated
10 Sept 2026

Machine-written summary

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

Apache HttpClient 5 (httpclient5) versions 5.4-alpha1 up to but not including 5.4.3 have a bug in their public suffix list validation that disables domain checks, which affects cookie handling and host name verification. The source does not describe what an attacker must do to exploit this or what specific impact results. Upgrade httpclient5 to version 5.4.3 or later.

Written 2 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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0097, the 62nd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:17 UTC First seen by agentprime
  2. 31 Oct 2026, 14:17 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.