CVE-2026-74761

Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Spoofing of RemoveSubscription clientId

HIGH

7.5

CVSS Score

Published: September 9, 2026 at 11:10 AM UTC

Updated: September 18, 2026 at 02:49 PM UTC

3 products affected across 1 vendorActiveMQActiveMQ AllApache ActiveMQ Broker

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Severity

HIGH7.5

Exploit prediction

EPSS 0.6%

SSVC

No known exploit

Description

Improper input validation in TopicRegion in Apache ActiveMQ, Apache ActiveMQ Broker, and Apache ActiveMQ All on all platforms. An authenticated client can spoof clientId when removing a durable topic subscription. This issue affects Apache ActiveMQ Broker: before 5.19.11, from 6.0.0 before 6.3.2; Apache ActiveMQ All: before 5.19.11, from 6.0.0 before 6.3.2; Apache ActiveMQ: before 5.19.11, from 6.0.0 before 6.3.2. Users are recommended to upgrade to version 6.3.2 or 5.19.11 which fixes the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

ActiveMQ · Apachemaven

95%

v < 5.19.116.0.0 ≤ v < 6.3.26.0.0

Affected range stops below 5.19.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.3.2, so it looks safe — our inference, not a vendor statement

ActiveMQ All · Apachemaven

95%

v < 5.19.116.0.0 ≤ v < 6.3.26.0.0

Affected range stops below 5.19.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.3.2, so it looks safe — our inference, not a vendor statement

Apache ActiveMQ Broker · Apachemaven

95%

v < 5.19.116.0.0 ≤ v < 6.3.26.2.0 ≤ v < 6.3.26.0.0

Affected range stops below 5.19.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.3.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://lists.apache.org/thread/n9md06jo7ccqmj2mntx4kpcl2d5xqntz

References (2)

Vendor AdvisoryMailing List

Source: cverecord

https://lists.apache.org/thread/n9md06jo7ccqmj2mntx4kpcl2d5xqntz

Mailing List

Source: af854a3a-2127-422b-91ae-364da2661108

http://www.openwall.com/lists/oss-security/2026/09/08/12

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-20

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