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Advisory record · GHSA-f8m2-889x-vw4x

AsyncHttpClient re-sends client-wide realm credentials to a cross-origin redirect target

CVSS 6.8 MediumEPSS 0.0053 · 44th percentile

Published by the GitHub Advisory Database at 17 Sept 2026, 17:19 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.asynchttpclient:async-http-clientMaven>=3.0.9, <3.0.12 || >=2.14.5, <2.16.13.0.12, 2.16.1
Identifiers
GHSA-f8m2-889x-vw4x · CVE-2026-85717
Weakness (CWE)
CWE-200 · CWE-522
Tags
Published
17 Sept 2026
Updated
17 Sept 2026

Machine-written summary

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

The async-http-client Maven package (org.asynchttpclient:async-http-client) versions 3.0.9 through 3.0.11 and 2.14.5 through 2.16.0 can re-send client-wide realm credentials, such as Basic or Digest credentials, to a different origin when following redirects that end in a 401 response. An attacker who controls a redirect target can receive these credentials, which requires the client to have a realm set on its configuration and redirects enabled. Upgrade to 3.0.12 or 2.16.1. As a workaround, set the realm on individual requests instead of on the client configuration.

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
6.8 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0053, the 44th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 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.