CVE-2026-59274: CWE-409 Improper Handling of Highly Compressed Data (Data Amplification, Decompression Bomb) in Spring Spring Integration
Description
CVE-2026-59274 is a medium severity vulnerability in Spring Integration's UnZipTransformer component. The vulnerability arises because the component does not limit the decompressed size or number of entries when processing zip archives. An attacker can exploit this by sending a specially crafted zip archive that exhausts JVM heap memory, resulting in a denial-of-service (DoS) condition. This affects specific versions of Spring Integration including 6.4.0 through 6.4.12, 6.5.0 through 6.5.10, 7.0.0 through 7.0.5, and exactly 7.1.0. No official patch or remediation guidance is currently provided. No known exploits are reported in the wild.
CVSS v3.1
Score 6.5medium
Affected software
Spring
Spring Integration
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The UnZipTransformer in Spring Integration versions 6.4.0 to 6.4.12, 6.5.0 to 6.5.10, 7.0.0 to 7.0.5, and 7.1.0 does not impose limits on decompressed entry size or entry count when processing zip archives. This improper handling of highly compressed data (CWE-409) can lead to JVM heap exhaustion, causing a denial-of-service outage. The CVSS 3.1 base score is 6.5 (medium severity) with network attack vector, low attack complexity, requiring low privileges and no user interaction, impacting availability only. No patch or official fix is currently documented.
Potential Impact
An attacker can cause a denial-of-service by sending a maliciously crafted zip archive that decompresses to a very large size or contains many entries, exhausting JVM heap memory in affected Spring Integration versions. This results in service outages due to resource exhaustion. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider implementing application-level controls to limit the size and number of entries in zip archives before processing. Monitor for unusually large or complex zip files to reduce risk of exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- vmware
- Date Reserved
- 2026-07-04T18:13:09.972Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8fd7c0acd9273b49e1757f
Added to database: 08/27/2026, 06:22:56 UTC
Last enriched: 09/10/2026, 09:10:59 UTC
Last updated: 10/11/2026, 06:48:17 UTC
Views: 75
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