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4.2 Medium

CVE-2026-59321 A single ScriptEngine instance is reused for every message on a script-backed channel

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 and versions

Product Affected versions Fixed in
Spring Integration 7.1.0 No fix stated
Spring Integration 7.0 7.0.0 → 7.0.5 No fix stated
Spring Integration 6.5 6.5.0 → 6.5.10 No fix stated
Spring Integration 6.4 6.4.0 → 6.4.12 No fix stated
Spring Integration 5.5 earliest → 5.5.21 No fix stated

References

Timeline

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