CVE-2026-1605Network attack vector

JVM crash via unreleased gzip request inflaters

Published Mar 5, 2026 · Updated Mar 5, 2026

Denial of service in Eclipse Jetty 12.0.0 through 12.0.31 and 12.1.0 through 12.1.5 allows remote attackers to crash the JVM. GzipHandler creates a GzipRequest Inflater for a gzip-encoded request but does not call destroy() when the response is not gzip-compressed, so the object never returns to the inflater pool. An unauthenticated remote attacker can repeat this request pattern to exhaust native and Java memory, producing an off-heap OutOfMemoryError and JVM crash.

CVSS severity7.5
High
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Eclipse Jetty 12.0.0 through 12.0.31 and 12.1.0 through 12.1.5 allows remote attackers to crash the JVM. GzipHandler creates a GzipRequest Inflater for a gzip-encoded request but does not call destroy() when the response is not gzip-compressed, so the object never returns to the inflater pool. An unauthenticated remote attacker can repeat this request pattern to exhaust native and Java memory, producing an off-heap OutOfMemoryError and JVM crash.

The record

CVE
CVE-2026-1605
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
The Eclipse Foundation
Product
Eclipse Jetty
Classifications
CWE-401, CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 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=12.0.0 <=12.0.31
  2. Affected versionversion=12.1.0. <=12.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse Jettyversion=12.0.0 <=12.0.31; version=12.1.0. <=12.1.5

Published CVSS scores

7.5Eclipse FoundationCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion

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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