Race condition in Spring Integration - CVE-2026-59321
Published: August 28, 2026
Vulnerability identifier: #VU146210
CSH Severity: Low
CVSS v4: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59321
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information or cause a denial of service.
The vulnerability exists due to improper concurrent access in shared JSR-223 ScriptEngine instances in script-backed channels when processing concurrent messages with engines that report THREADING=null. A remote user can trigger concurrent script evaluations to disclose sensitive information or cause a denial of service.
In multi-tenant or request/response flows, one message's payload or header bindings may leak into another message's script evaluation.
Affected software
Spring Integration
Library Support for Spring
Library Support for Spring
How to mitigate CVE-2026-59321
Install security update from vendor's website.
Spring Integration - addressed in versions 5.5.22, 6.4.13, 6.5.11, 7.0.5.1, 7.0.6, 7.1.0.1, 7.1.1
Library Support for Spring - update to 3.5.19
Library Support for Spring - update to 3.5.19