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CVE-2026-49432— Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: STOMP negative content-length enables denial of service

Quick assessment

Affected
Apache Software Foundation Apache ActiveMQ
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache ActiveMQ是Apache基金会的一款消息队列中间件。 Apache ActiveMQ存在输入验证错误漏洞，该漏洞源于输入验证不当，可能导致远程未经过身份验证的对等端通过发送负的content-length触发拒绝服务行为。以下版本受到影响：Apache ActiveMQ 5.19.8之前版本、6.0.0至6.2.7之前版本；Apache ActiveMQ All 5.19.8之前版本、6.0.0至6.2.7之前版本；Apache ActiveMQ Stomp 5.19.8之前版本、6.

AI Predicted 7.5 Difficulty: Easy EPSS 0.78% · P54

Affected Version Matrix 6

VendorProduct Version RangeStatus
Apache Software Foundation Apache ActiveMQ < 5.19.8 affected
6.0.0< 6.2.7 affected
Apache Software Foundation Apache ActiveMQ All < 5.19.8 affected
6.0.0< 6.2.7 affected
Apache Software Foundation Apache ActiveMQ Stomp < 5.19.8 affected
6.0.0< 6.2.7 affected
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I. Basic Information for CVE-2026-49432

Vulnerability Information
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Vulnerability Title
Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: STOMP negative content-length enables denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Input Validation vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp. A remote unauthenticated peer that can reach an exposed STOMP connector can trigger denial-of-service behavior by sending a negative content-length. For the NIO STOMP transport, an attacker can keep streaming body bytes and grow the per-connection command buffer beyond configured limits to cause OOM. For the blocking STOMP protocol, an error will instead force abnormal transport exception handling for the affected connection and closure. This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Stomp: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache ActiveMQ 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache ActiveMQ是Apache基金会的一款消息队列中间件。 Apache ActiveMQ存在输入验证错误漏洞，该漏洞源于输入验证不当，可能导致远程未经过身份验证的对等端通过发送负的content-length触发拒绝服务行为。以下版本受到影响：Apache ActiveMQ 5.19.8之前版本、6.0.0至6.2.7之前版本；Apache ActiveMQ All 5.19.8之前版本、6.0.0至6.2.7之前版本；Apache ActiveMQ Stomp 5.19.8之前版本、6.
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache ActiveMQ 0 ~ 5.19.8 -
Apache Software Foundation Apache ActiveMQ All 0 ~ 5.19.8 -
Apache Software Foundation Apache ActiveMQ Stomp 0 ~ 5.19.8 -

II. Public POCs for CVE-2026-49432

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III. Intelligence Information for CVE-2026-49432

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Mailing List Discussions for CVE-2026-49432 (1)

Same Patch Batch · Apache Software Foundation · 2026-06-30 · 10 CVEs total

CVE-2026-54475 Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Temporary destination owners
CVE-2026-53917 Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Client, Apache ActiveMQ Broker: Unbo
CVE-2026-53916 Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: Unbounded header buffer in ST
CVE-2026-52760 Apache ActiveMQ, Apache ActiveMQ Web Console: Stored XSS via Unescaped values in ActiveMQ
CVE-2026-50750 Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire
CVE-2026-50734 Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire
CVE-2026-49877 Apache ActiveMQ: Authenticated web users retain admin access by default in the Web Console
CVE-2026-49434 Apache ActiveMQ Broker, Apache ActiveMQ, Apache ActiveMQ All: LdapNetworkConnector instant
CVE-2025-53648 Apache Gravitino: SQL misconfiguration can access or truncate files

IV. Related Vulnerabilities

Same product: Apache ActiveMQ
Same vendor: Apache Software Foundation
Same weakness: CWE-20

V. Comments for CVE-2026-49432

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