Vulnerability · Published Jun 9, 2026 · Assigned by vmware

CVE-2026-40993Unfiltered Java Native Deserialization of SAML 2.0 Asserting Party Credentials BLOB Database Entry

High 7.3

In plain English

A high-severity unsafe deserialization in Spring Security from Spring. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.2%top 90.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

An attacker with write permissions to the database table managed by JdbcAssertingPartyMetadataRepository (saml2_asserting_party_metadata) may be able to store malicious serialized payloads in the columns containing the collection of verification or encryption credentials (verification_credentials and encryption_credentials, respectively). Affected versions: Spring Security 7.0.0 through 7.0.5.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	org.springframework.security:spring-security-saml2-service-provider	7.0.6	GHSA-2q7c-5gjm-7q23

Affected products (as reported)

Vendor	Product	Versions
Spring	Spring Security	7.0.0 – before 7.0.5.1

Weakness: CWE-502 · Vector: CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:H

References

https://spring.io/security/cve-2026-40993