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CVE-2026-59274

Unbounded decompression in UnZipTransformer enables zip-bomb DoS

MEDIUM
6.5
CVSS Score
Published: August 27, 2026 at 05:20 AM UTC
Updated: September 1, 2026 at 06:41 PM UTC
2 products affected across 2 vendorsSpring IntegrationSpring Integration

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Spring Integration· VMware
95%
6.4.0 ≤ v < 6.4.136.5.0 ≤ v < 6.5.117.0.0 ≤ v < 7.0.5.17.1.0 ≤ v < 7.1.0.1
Affected range stops below 6.4.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.5.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.5.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.1.0.1, so it looks safe — our inference, not a vendor statement
Spring Integration· Spring
60%
6.4.0 ≤ v ≤ 6.4.126.5.0 ≤ v ≤ 6.5.107.0.0 ≤ v ≤ 7.0.56.4.06.5.07.0.07.1.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://spring.io/security/cve-2026-59274

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMvmware
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-409

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