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

Routine

MEDIUM 4.2UPGRADE

CVE-2026-59321 is a medium-severity flaw (CVSS 4.2) affecting spring integration. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 Integr

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.2 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-362
Published	2026-08-27
Last modified	2026-08-31

Publisher (CNA): VMware · Vendor: vmware

Last updated 2026-08-31 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-27 20:17 UTCPublished CVE record published
2026-08-31 17:27 UTCUpdated Record last modified

vmware spring integration UPGRADE

Affected: <= 5.5.21 · >= 6.4.0 and <= 6.4.12 · >= 6.5.0 and <= 6.5.10 · >= 7.0.0 and < 7.0.5.1 · >= 7.1.0 and < 7.1.0.1

Fixed in: 7.0.5.1, 7.1.0.1

Safe to downgrade to: a release before 6.4.0

1. Check installed version

apt-cache policy spring-integration || rpm -q spring-integration || spring-integration --version

2. UPGRADE to 7.0.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spring-integration

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spring-integration

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.4.0 (Debian / Ubuntu)

apt-cache madison spring-integration sudo apt install spring-integration=<VERSION_BEFORE_6.4.0> sudo apt-mark hold spring-integration

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list spring-integration sudo dnf downgrade spring-integration-<VERSION_BEFORE_6.4.0> sudo dnf versionlock add spring-integration

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59321?

spring integration: upgrade to 7.0.5.1, 7.1.0.1. Exact commands for each OS are on this page.

Is CVE-2026-59321 being exploited?

CVE-2026-59321 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59321 affect?

CVE-2026-59321 affects spring integration. Severity is medium (CVSS 4.2). 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 s

How urgent is CVE-2026-59321?

Priority 16/100. No elevated risk signals yet.

Software pages

VMware vulnerabilities · Kotlin vulnerabilities

Related CVEs

CVE-2026-47880 MEDIUM 5.4 UPGRADE A producer who can publish to a JMS destination consumed by any Spring Integration JMS inbound component can s
CVE-2026-47859 MEDIUM 5.4 UPGRADE RFC6587SyslogDeserializer, used by the Spring Integration syslog TCP inbound adapter to decode RFC 6587 / RFC
CVE-2026-47856 MEDIUM 6.3 UPGRADE Spring Integration's JSON to object conversion uses the json__TypeId__ header to choose the deserialization ta
CVE-2026-47861 MEDIUM 6.3 UPGRADE An unauthenticated remote attacker who can send a single UDP packet to a Spring Integration UDP inbound adapte
CVE-2026-47862 MEDIUM 5.4 UPGRADE An attacker who can set the file_name header on a message reaching a ZipTransformer with ZipResultType.FILE (t

References

← Back to latest CVEs