Medium · CVSS 6.5CVE-2026-59274

Unbounded decompression in UnZipTransformer enables zip-bomb DoSCVE-2026-59274

Answer in brief

CVE-2026-59274 records a Medium severity (CVSS 6.5) vulnerability in Unbounded decompression in UnZipTransformer enables zip-bomb DoS. The current sources do not mark it as known exploited. The current feed maps Spring/Spring Integration (generic), Spring/Spring Integration (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 27, 2026Updated Sep 1, 2026Source checked Oct 11, 2026First seen by HOL Aug 27, 2026Material review Sep 1, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.5
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Spring/Spring Integration (generic), Spring/Spring Integration (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:vmware:spring_integration::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Spring/Spring Integrationgeneric	7.1.0 \|\| 7.0.0 \|\| 6.5.0 \|\| 6.4.0	Not reported
Spring/Spring Integrationgeneric	7.1.0 \|\| >=7.0.0 <=7.0.5 \|\| >=6.5.0 <=6.5.10 \|\| >=6.4.0 <=6.4.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Spring/Spring Integration, Spring/Spring Integration.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 1, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 27, 2026

Sources and claim methodology

Source referencespring.io

Upstream source description

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

Quoted source text, attributed separately from HOL analysis.