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High severity · published Jun 9, 2026
CVE-2026-40993
Unfiltered Java Native Deserialization of SAML 2.0 Asserting Party Credentials BLOB Database Entry
7.2
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SS
Spring Security · Spring
7.0.0 before 7.0.5.1 · source: vendor, NVD
Affected product
SS
Spring Security
Spring
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40993
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40993
Vendor Advisory
https://spring.io/security/cve-2026-40993
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