Input validation error in Spring AI - CVE-2026-40966
Published: April 27, 2026
Vulnerability identifier: #VU128237
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40966
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper input validation in VectorStoreChatMemoryAdvisor when processing user-supplied conversationId values. A remote attacker can inject crafted filter logic to disclose sensitive information.
Only applications that pass user-supplied input as a conversationId are vulnerable.
Affected software
Spring AI
How to mitigate CVE-2026-40966
Install security update from vendor's website.
Spring AI - addressed in versions 1.0.6, 1.1.5