CVE-2026-74761Network attack vector

Cross-client subscription deletion via spoofed clientId

Published Sep 9, 2026 · Updated Sep 9, 2026

Improper input validation in Apache ActiveMQ before 5.19.11 and 6.0.0 through 6.3.1 allows authenticated clients to delete subscriptions. TopicRegion builds the durable-subscription lookup key from the clientId supplied in RemoveSubscriptionInfo rather than the authenticated connection context. Any authenticated broker client can name another clientId and inactive durable subscription, causing its removal and interrupting future topic delivery.

CVSS severityUnavailable
Unscored
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Apache ActiveMQ before 5.19.11 and 6.0.0 through 6.3.1 allows authenticated clients to delete subscriptions. TopicRegion builds the durable-subscription lookup key from the clientId supplied in RemoveSubscriptionInfo rather than the authenticated connection context. Any authenticated broker client can name another clientId and inactive durable subscription, causing its removal and interrupting future topic delivery.

The record

CVE
CVE-2026-74761
Published
Sep 9, 2026
Updated
Sep 9, 2026
Vendor
The Apache Software Foundation
Product
Apache ActiveMQ All
Classifications
CWE-20
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 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 <5.19.11
  2. Affected versionversion=6.0.0 <6.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache ActiveMQ Allversion=0 <5.19.11; version=6.0.0 <6.3.2
The Apache Software Foundation · Apache ActiveMQ Brokerversion=0 <5.19.11; version=6.0.0 <6.3.2
The Apache Software Foundation · Apache ActiveMQversion=0 <5.19.11; version=6.0.0 <6.3.2

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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

CWE-20Improper Input Validation

Public exploit references

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Technologies

Your stack

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Your stack

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