CVE-2026-59274: The UnZipTransformer does not limit decompressed entry size or entry count when processing archives

Routine

MEDIUM 6.5UPGRADE

CVE-2026-59274 is a medium-severity flaw (CVSS 6.5) affecting spring integration. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The UnZipTransformer does not limit decompressed entry size or entry count when processing archives. Consequently, an attacker can send a zip archive that can exhaust JVM heap memory, causing a denial-of-service outage. 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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-409
Published	2026-08-27
Last modified	2026-09-01

Publisher (CNA): VMware · Vendor: vmware

Last updated 2026-09-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-27 06:17 UTCPublished CVE record published
2026-09-01 18:27 UTCUpdated Record last modified

vmware spring integration UPGRADE

Affected: >= 6.4.0 and < 6.4.13 · >= 6.5.0 and < 6.5.11 · >= 7.0.0 and < 7.0.5.1 · >= 7.1.0 and < 7.1.0.1

Fixed in: 6.4.13, 6.5.11, 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 6.4.13 (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.

Advisories and coverage

Official advisories

Spring Security Advisories: cve-2026-59274 - MEDIUM - Unbounded decompression in UnZipTransformer enables zip-bomb DoS 2026-08-20

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-2026-59274?

spring integration: upgrade to 6.4.13, 6.5.11, 7.0.5.1, 7.1.0.1. Exact commands for each OS are on this page.

Is CVE-2026-59274 being exploited?

CVE-2026-59274 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-2026-59274 affect?

CVE-2026-59274 affects spring integration. Severity is medium (CVSS 6.5). The UnZipTransformer does not limit decompressed entry size or entry count when processing archives. Consequently, an attacker can send a zip archive that can exhaust JVM heap memory, causing a denial-of-service outage. Spring Integration 7

How urgent is CVE-2026-59274?

Priority 32/100. No elevated risk signals yet.

Software pages

VMware vulnerabilities

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References

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