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Advisory record · GHSA-73j9-m294-fvv9

dynamic_oidc identities are not namespaced by connection in ash_authentication, allowing cross-connection account takeover

CVSS 9.1 CriticalCriticalEPSS 0.0066 · 51st percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 17 Sept 2026, 15:19 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
ash_authenticationHex>=5.0.0-rc.10, <5.0.0-rc.145.0.0-rc.14
Identifiers
GHSA-73j9-m294-fvv9 · CVE-2026-91039 · EEF-CVE-2026-91039
Weakness (CWE)
CWE-290
Tags
Published
17 Sept 2026
Updated
17 Sept 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 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CNA (EEF)
  • CISA KEV Not listed.
  • EPSS 0.0066, the 51st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:25 UTC First seen by agentprime
  2. 31 Oct 2026, 15:25 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.