CVE-2026-59321

Shared JSR-223 ScriptEngine evaluated concurrently without THREADING check

Published Aug 27, 2026 CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed
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

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
References
History
Type Values Removed Values Added
First Time appeared Vmware
Vmware spring Integration
CPEs cpe:2.3:a:vmware:spring_integration:*:*:*:*:*:*:*:*
Vendors & Products Vmware
Vmware spring Integration
Type Values Removed Values Added
Weaknesses CWE-667
Type Values Removed Values Added
Weaknesses CWE-362
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Spring
Spring spring Integration
Vendors & Products Spring
Spring spring Integration
Type Values Removed Values Added
Weaknesses CWE-667
Type Values Removed Values Added
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
Title Shared JSR-223 ScriptEngine evaluated concurrently without THREADING check
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
vmware
Published
Updated
Aug 28, 2026, 10:46 PM
Reserved
Jul 4, 2026, 6:14 PM
Status
Analyzed
Published
Aug 27, 2026, 8:17 PM
Modified
Aug 31, 2026, 5:27 PM