CVE-2026-59303: Dynamic destination cache size is not properly bound in Spring Cloud Stream. Spring Cloud Stream 5.0.0 - 5.0.2

Routine

LOW 3.1UPGRADE

CVE-2026-59303 is a low-severity flaw (CVSS 3.1) affecting spring cloud stream. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dynamic destination cache size is not properly bound in Spring Cloud Stream. Spring Cloud Stream 5.0.0 - 5.0.2 Spring Cloud Stream 4.3.0 - 4.3.3 Spring Cloud Stream 4.2.0 - 4.2.6

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.1 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-770
Published	2026-08-27
Last modified	2026-09-04

Publisher (CNA): VMware · Vendor: vmware

Last updated 2026-09-04 · 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
2026-09-04 19:31 UTCUpdated Record last modified

vmware spring cloud stream UPGRADE

Affected: >= 4.2.0 and < 4.2.7 · >= 4.3.0 and < 4.3.4 · >= 5.0.0 and < 5.0.3

Fixed in: 4.2.7, 4.3.4, 5.0.3

Safe to downgrade to: a release before 4.2.0

1. Check installed version

apt-cache policy spring-cloud-stream || rpm -q spring-cloud-stream || spring-cloud-stream --version

2. UPGRADE to 4.2.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spring-cloud-stream

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spring-cloud-stream

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 4.2.0 (Debian / Ubuntu)

apt-cache madison spring-cloud-stream sudo apt install spring-cloud-stream=<VERSION_BEFORE_4.2.0> sudo apt-mark hold spring-cloud-stream

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

dnf --showduplicates list spring-cloud-stream sudo dnf downgrade spring-cloud-stream-<VERSION_BEFORE_4.2.0> sudo dnf versionlock add spring-cloud-stream

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-2026-59303?

spring cloud stream: upgrade to 4.2.7, 4.3.4, 5.0.3. Exact commands for each OS are on this page.

Is CVE-2026-59303 being exploited?

CVE-2026-59303 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-2026-59303 affect?

CVE-2026-59303 affects spring cloud stream. Severity is low (CVSS 3.1). Dynamic destination cache size is not properly bound in Spring Cloud Stream. Spring Cloud Stream 5.0.0 - 5.0.2 Spring Cloud Stream 4.3.0 - 4.3.3 Spring Cloud Stream 4.2.0 - 4.2.6

How urgent is CVE-2026-59303?

Priority 14/100. No elevated risk signals yet.

Software pages

VMware vulnerabilities

Related CVEs

CVE-2026-59304 LOW 3.1 UPGRADE Improper caching of the original content type in Spring Cloud Stream Avro. Spring Cloud Stream 5.0.0 - 5.0.2 S
CVE-2026-59305 LOW 3.1 UPGRADE Partition interceptor may be improperly added while sending message. Spring Cloud Stream 5.0.0 - 5.0.2 Spring
CVE-2026-59306 LOW 3.1 UPGRADE Potential for deserialization of untrusted types in Spring Cloud Stream. Spring Cloud Stream 5.0.0 - 5.0.2 Spr

References

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