Deserialization of Untrusted Data in Spring Security - CVE-2026-40993
Published: August 28, 2026
Vulnerability identifier: #VU146179
CSH Severity: Low
CVSS v4: 5.8 [CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40993
CWE-ID: CWE-502
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote privileged user to execute arbitrary code.
The vulnerability exists due to insecure deserialization in JdbcAssertingPartyMetadataRepository when reading serialized credential collections from the saml2_asserting_party_metadata database table. A remote privileged user can store a malicious serialized payload in the verification_credentials or encryption_credentials columns to execute arbitrary code.
Exploitation requires write access to the repository-managed database table.
Affected software
Spring Security
How to mitigate CVE-2026-40993
Install security update from vendor's website.
Spring Security - update to 7.0.6