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CVE-2026-59321— Shared JSR-223 ScriptEngine evaluated concurrently without THREADING check

Quick assessment

Affected
Spring Spring Integration
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

每个基于脚本的通道上，所有的消息都会复用同一个 ScriptEngine 实例。对于报告 THREADING=null（即非线程安全，例如 Kotlin kts 引擎）的 JSR-223 引擎，并发处理消息时可能会破坏引擎内部状态，从而导致某条消息的载荷/头部绑定泄漏到另一条消息的脚本执行中，或引发非预期的异常。 受影响的版本范围： Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10

CVSS 4.2 · Medium

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-59321

Vulnerability Information
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Vulnerability Title
Shared JSR-223 ScriptEngine evaluated concurrently without THREADING check
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Spring Spring Integration 7.1.0 -

II. Public POCs for CVE-2026-59321

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III. Intelligence Information for CVE-2026-59321

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Vendor Advisories for CVE-2026-59321 (1)

Same Patch Batch · Spring · 2026-08-27 · 64 CVEs total

CVE-2026-59270 9.4 CRITICAL Spring Security embedded UnboundID LDAP server exposes well-known administrative bind DN o
CVE-2026-47877 8.2 HIGH Spring Security Authorization Server Default Consent Page is vulnerable to Cross-Site Scri
CVE-2026-59324 8.2 HIGH fluxTransform shared RequestMessageHolder causes cross-message header leakage under async
CVE-2026-59316 8.2 HIGH Spring Authorization Server Default Consent Page is vulnerable to Cross-Site Scripting (XS
CVE-2026-59307 8.0 HIGH Deserialization allow-list silently bypassed: setBeanClassLoader replaces deserializer but
CVE-2026-47879 7.7 HIGH Spring Cloud Gateway SSRF and native file access with gRPC
CVE-2026-47849 7.1 HIGH Spring Data REST allows mutation of identifier and version properties via JSON Patch
CVE-2026-59311 6.8 MEDIUM Fixed predictable /tmp/ziptransformer work directory enables symlink pre-creation
CVE-2026-59272 6.8 MEDIUM Log4j2 AmqpAppender disables TLS hostname verification by default
CVE-2026-59293 6.6 MEDIUM SMB minimum protocol dialect defaults to SMB1
CVE-2026-59284 6.6 MEDIUM Spring Cloud Commons no allow list for writable env actuator endpoint
CVE-2026-59275 6.6 MEDIUM Remote JVM termination: nested-array Java deserialization bypasses allowlist, triggers Sta
CVE-2026-59278 6.5 MEDIUM In Spring for Apache Kafka, SSRF via DNS resolution triggered by untrusted java.net types
CVE-2026-59317 6.5 MEDIUM In Spring for Apache Kafka, missing header validation in DeadLetterPublishingRecovererFact
CVE-2026-59274 6.5 MEDIUM Unbounded decompression in UnZipTransformer enables zip-bomb DoS
CVE-2026-59320 6.5 MEDIUM In Spring AMQP the link credit never replenished on listener exception path
CVE-2026-47864 6.4 MEDIUM Unsafe Java deserialization in SerializingHttpMessageConverter — remote code execution
CVE-2026-59322 6.3 MEDIUM EmbeddedHeadersJsonMessageMapper default gives wire peer full control of MessageHeaders
CVE-2026-47881 5.9 MEDIUM Denial of Service in Spring Batch FlatFileItemReader via Malformed Input File
CVE-2026-59276 5.9 MEDIUM Timing Attack via Non-Constant-Time Comparison of Sensitive Values

Showing top 20 of 64 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Spring Integration
Same vendor: Spring

V. Comments for CVE-2026-59321

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