CVE-2025-1634Public exploitNetwork attack vector

Application crash via unreleased response output stream

Published Feb 26, 2025 · Updated May 6, 2026

Memory leak in Quarkus RESTEasy Classic allows remote attackers to crash affected applications through aborted HTTP requests. VertxHttpResponse.finish returns after a response closes without closing its output stream, leaving pooled buffers retained after each aborted request. Repeated low-timeout requests require no authentication and progressively exhaust heap memory until an OutOfMemoryError crashes the application.

CVSS severity7.5
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Quarkus RESTEasy Classic allows remote attackers to crash affected applications through aborted HTTP requests. VertxHttpResponse.finish returns after a response closes without closing its output stream, leaving pooled buffers retained after each aborted request. Repeated low-timeout requests require no authentication and progressively exhaust heap memory until an OutOfMemoryError crashes the application.

The record

CVE
CVE-2025-1634
Published
Feb 26, 2025
Updated
May 6, 2026
Vendor
Quarkus
Product
Quarkus
Classifications
CWE-401, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=0 <3.15.3
  2. Affected versionversion=0 <3.8.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Quarkus · Quarkusversion=0 <3.15.3; version=0 <3.8.6
389 Directory Server · Red Hat build of QuarkusAffected versions are unavailable in this record.

Published CVSS scores

7.5GitHub Advisory DatabaseCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.003Application Exhaustion Flood

Public exploit references

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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