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Advisory record · GHSA-ww38-37g9-m3q3

Spring Security SAML2 Service Provider: Decryption Oracle Vulnerability from Unsigned SAML Response and Logout Payloads

CVSS 3.7 LowEPSS 0.0015 · 4th percentile

Published by the GitHub Advisory Database at 10 Jun 2026, 00:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.springframework.security:spring-security-saml2-service-providerMaven>=7.0.0, <7.0.6 || >=6.5.0, <6.5.11 || >=6.4.0, <=6.4.16 || >=6.3.0, <=6.3.16 || >=5.8.0, <=5.8.25 || <=5.7.237.0.6, 6.5.11
Identifiers
GHSA-ww38-37g9-m3q3 · CVE-2026-41694
Weakness (CWE)
CWE-347
Tags
Published
10 Jun 2026
Updated
12 Aug 2026

Machine-written summary

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

Spring Security SAML2 Service Provider (org.springframework.security:spring-security-saml2-service-provider) versions 5.7.23 and earlier, 5.8.x through 5.8.25, 6.3.x through 6.3.16, 6.4.x through 6.4.16, 6.5.0 through 6.5.10, and 7.0.0 through 7.0.5 are affected. The library decrypts SAML Responses and parts of LogoutRequests and LogoutResponses without checking a valid signature, so an attacker who can send crafted SAML payloads may be able to use the Service Provider as a decryption oracle. Upgrade to 7.0.6 or 6.5.11, or to the fixed version on your release line.

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
3.7 Low 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CNA (vmware)
  • CISA KEV Not listed.
  • EPSS 0.0015, the 4th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:19 UTC First seen by agentprime
  2. 31 Oct 2026, 14:19 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.