Vulnerability · Published Aug 27, 2026 · Assigned by vmware
CVE-2026-59321Shared JSR-223 ScriptEngine evaluated concurrently without THREADING check
Medium 4.2
In plain English
A medium-severity race condition in Spring Integration 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 7% of all known vulnerabilities).
Official description
A single ScriptEngine instance is reused for every message on a script-backed channel. For JSR-223 engines that report THREADING=null (not thread-safe, e.g. the Kotlin kts engine), concurrent message processing can corrupt engine-internal state, potentially leaking one message's payload/headers bindings into another message's script evaluation or throwing spurious exceptions. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10 Spring Integration 6.4.0 - 6.4.12 Spring Integration 5.5.21 and earlier
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Spring | Spring Integration | 7.1.07.0.0 – through 7.0.56.5.0 – through 6.5.106.4.0 – through 6.4.120 – through 5.5.21 |
Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N