EUVD-2026-67202
GHSA-jwww-wmvq-qm8j
Severity by source
AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Network vector as channels are typically message-driven over network protocols; AC:H for mandatory concurrent timing; PR:L for required channel send access; C:L/I:L for partial cross-message data leakage with no availability impact.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
1DescriptionCVE.org
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
AnalysisAI
Concurrent message processing in Spring Integration's script-backed channels causes shared ScriptEngine state corruption when using JSR-223 engines that declare THREADING=null, such as the Kotlin KTS engine. Affected Spring Integration versions from 5.5.21 and earlier through 7.1.0 are susceptible to cross-message data leakage, where one message's payload or header bindings can bleed into another message's script evaluation context under concurrent load. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three specific conditions to hold simultaneously: (1) the target Spring Integration application must be configured with at least one channel that uses script-backed message processing via the JSR-223 ScriptEngine API; (2) the script engine in use must declare THREADING=null - the Kotlin KTS engine is the named example, but any JSR-223 engine without thread-safety guarantees qualifies; and (3) the channel must receive concurrent messages, meaning multiple threads must process messages simultaneously through the same channel instance. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N scores 4.2 (Medium), and the signal breakdown is internally consistent. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Consult the vendor advisory at https://spring.io/security/cve-2026-59321 for exact patched version numbers - specific fix versions are not independently confirmed from the data provided and should not be inferred. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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