CVE-2026-59274Network attack vector

Service interruption via unbounded archive decompression

Published Aug 27, 2026 · Updated Aug 27, 2026

Unbounded decompression in Spring Integration allows remote authenticated users to interrupt service by submitting a crafted ZIP archive. The UnZipTransformer expands archive entries without enforcing a per-entry size limit or maximum entry count, allowing compressed input to exhaust the JVM heap. Exploitation requires an application to route attacker-controlled ZIP content through the transformer, and successful exhaustion leaves the hosting application unavailable.

CVSS severity6.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unbounded decompression in Spring Integration allows remote authenticated users to interrupt service by submitting a crafted ZIP archive. The UnZipTransformer expands archive entries without enforcing a per-entry size limit or maximum entry count, allowing compressed input to exhaust the JVM heap. Exploitation requires an application to route attacker-controlled ZIP content through the transformer, and successful exhaustion leaves the hosting application unavailable.

The record

CVE
CVE-2026-59274
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring Integration
Classifications
T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.4.0 <=6.4.12
  2. Affected versionversion=6.5.0 <=6.5.10
  3. Affected versionversion=7.0.0 <=7.0.5
  4. Affected versionversion=7.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Spring · Spring Integrationversion=6.4.0 <=6.4.12; version=6.5.0 <=6.5.10; version=7.0.0 <=7.0.5; version=7.1.0

Published CVSS scores

6.5SpringCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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