CVE-2026-40989: Under infinite recursion in the routing layer, request-handling can cause OOM error. Affected Spring Products

Routine

MEDIUM 5.7UPGRADE

CVE-2026-40989 is a medium-severity flaw (CVSS 5.7) affecting spring cloud function. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Under infinite recursion in the routing layer, request-handling can cause OOM error. Affected Spring Products and Versions: Spring Cloud Function 3.2.x: versions prior to 3.2.16 Spring Cloud Function 4.1.x: versions prior to 4.1.10 Spring Cloud Function 4.2.x: versions prior to 4.2.6 Spring Cloud Function 4.3.x: versions prior to 4.3.3 Spring Cloud Function 5.0.x: versions prior to 5.0.2 Older, unsupported versions are also affected.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.7 (Medium)
Attack vector	Physical
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-674
Published	2026-06-01
Last modified	2026-07-22

Publisher (CNA): VMware · Vendor: vmware

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-01 19:16 UTCPublished CVE record published
2026-07-22 07:10 UTCUpdated Record last modified

vmware spring cloud function UPGRADE

Affected: >= 3.2.0 and < 3.2.16 · >= 4.1.0 and < 4.1.10 · >= 4.2.0 and < 4.2.6 · >= 4.3.0 and < 4.3.3 · >= 5.0.0 and < 5.0.2

Fixed in: 3.2.16, 4.1.10, 4.2.6, 4.3.3, 5.0.2

Safe to downgrade to: a release before 3.2.0

1. Check installed version

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

2. UPGRADE to 3.2.16 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spring-cloud-function

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 3.2.0 (Debian / Ubuntu)

apt-cache madison spring-cloud-function sudo apt install spring-cloud-function=<VERSION_BEFORE_3.2.0> sudo apt-mark hold spring-cloud-function

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

dnf --showduplicates list spring-cloud-function sudo dnf downgrade spring-cloud-function-<VERSION_BEFORE_3.2.0> sudo dnf versionlock add spring-cloud-function

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-2026-40989?

spring cloud function: upgrade to 3.2.16, 4.1.10, 4.2.6, 4.3.3, 5.0.2. Exact commands for each OS are on this page.

Is CVE-2026-40989 being exploited?

CVE-2026-40989 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-2026-40989 affect?

CVE-2026-40989 affects spring cloud function. Severity is medium (CVSS 5.7). Under infinite recursion in the routing layer, request-handling can cause OOM error. Affected Spring Products and Versions: Spring Cloud Function 3.2.x: versions prior to 3.2.16 Spring Cloud Function 4.1.x: versions prior to 4.1.10 Spring

How urgent is CVE-2026-40989?

Priority 23/100. No elevated risk signals yet.

Software pages

VMware vulnerabilities

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References

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