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Advisory record · EEF-CVE-2026-53425

Missing InResponseTo validation in Samly allows acceptance of unsolicited SAML responses

CVSS 7.6 HighEPSS 0.0022 · 13th percentile

Published by OSV at 20 Aug 2026, 17:26 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
samlyHex>=0.3.0No fixed version yet
Identifiers
EEF-CVE-2026-53425 · CVE-2026-53425
Weakness (CWE)
CWE-345
Tags
Published
20 Aug 2026
Updated
8 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
7.6 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CNA (EEF)
  • CISA KEV Not listed.
  • EPSS 0.0022, the 13th 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.