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Apache ActiveMQ CVE-2026-74761

| EUVDEUVD-2026-74829 HIGH
Improper Input Validation (CWE-20)
7.5
CVSS 3.1 · Vendor
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Severity by source

Vendor (CNA) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
vuln.today AI
6.5 MEDIUM

Description explicitly requires an authenticated client (PR:L minimum); no confidentiality or availability impact per the attack mechanics; integrity is high via subscription deletion.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (CNA).

CVSS VectorVendor

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

7
Metadata Corrected
Sep 10, 2026 - 18:40 vuln.today
tag: Information Disclosure removed
Analysis Updated
Sep 10, 2026 - 18:32 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Sep 10, 2026 - 18:23 vuln.today
cvss_changed
CVSS changed
Sep 10, 2026 - 18:23 NVD
7.5 (HIGH)
Patch available
Sep 09, 2026 - 12:03 EUVD
Analysis Generated
Sep 08, 2026 - 16:16 vuln.today
CVE Published
Sep 08, 2026 - 15:48 oss-security
MEDIUM

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

Improper input validation in the TopicRegion component of Apache ActiveMQ allows an authenticated broker client to forge the clientId field in a durable subscription removal request, causing the broker to delete a subscription belonging to a different, legitimate client. All ActiveMQ deployments in the 5.x line before 5.19.11 and the 6.x line before 6.3.2 are affected across all platforms. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Requires at minimum a valid, authenticated broker session - the attacker must hold a username and password (or client certificate, depending on broker security configuration) accepted by the ActiveMQ broker. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The supplied CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) assigns PR:N, which directly conflicts with the description's explicit statement that 'an authenticated client' performs the attack. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to Apache ActiveMQ 6.3.2 or 5.19.11, which contain the vendor-released fix per the advisory at https://lists.apache.org/thread/n9md06jo7ccqmj2mntx4kpcl2d5xqntz. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify all Apache ActiveMQ deployments and document which versions are in use (particularly 5.x pre-5.19.11 and 6.x pre-6.3.2). …

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CVE-2026-74761 vulnerability details – vuln.today

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