GHSA-2q7c-5gjm-7q23: org.springframework.security:spring-security-saml2-service-provider (CVE-2026-40993)

Spring Security SAML2 Service Provider is vulnerable to Deserialization of Untrusted Data via JdbcAssertingPartyMetadataRepository

CVSS 7.3 HighEPSS 0.0020 · 9th 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.

Package	Ecosystem	Affected	Fixed in
org.springframework.security:spring-security-saml2-service-provider	Maven	>=7.0.0, <7.0.6	7.0.6

Identifiers

GHSA-2q7c-5gjm-7q23 · CVE-2026-40993

Weakness (CWE)

CWE-502

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 7.0.0 through 7.0.5 are affected. An attacker with write access to the saml2_asserting_party_metadata database table used by JdbcAssertingPartyMetadataRepository can store malicious serialized data in the verification and encryption credential columns, which may lead to deserialization of untrusted data. Upgrade to version 7.0.6, which fixes the issue.

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

Score	Rating	CVSS	Vector	Source
7.3	High	3.1	CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:H	CNA (vmware)

CISA KEV Not listed.
EPSS 0.0020, the 9th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

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