Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ: Improper Limitation of a Pathname to a Restricted Classpath Directory
Summary
| CVE | CVE-2026-33227 |
|---|---|
| State | PUBLISHED |
| Assigner | apache |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-07 09:16:20 UTC |
| Updated | 2026-04-08 16:16:23 UTC |
| Description | Improper validation and restriction of a classpath path name vulnerability in Apache ActiveMQ Client, Apache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ Web, Apache ActiveMQ. In two instances (when creating a Stomp consumer and also browsing messages in the Web console) an authenticated user provided "key" value could be constructed to traverse the classpath due to path concatenation. As a result, the application is exposed to a classpath path resource loading vulnerability that could potentially be chained together with another attack to lead to exploit. This issue affects Apache ActiveMQ Client: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ Broker: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ All: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ Web: before 5.19.3, from 6.0.0 before 6.2.2; Apache ActiveMQ: before 5.19.3, from 6.0.0 before 6.2.2. Users are recommended to upgrade to version 5.19.4 or 6.2.3, which fixes the issue. Note: 5.19.3 and 6.2.2 also fix this issue, but that is limited to non-Windows environments due to a path separator resolution bug fixed in 5.19.4 and 6.2.3. |
Risk And Classification
Primary CVSS: v3.1 4.3 MEDIUM from ADP
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS: 0.000360000 probability, percentile 0.104380000 (date 2026-04-07)
Problem Types: CWE-22 | CWE-22 CWE-22 Improper input validation for resource loading
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | DECLARED | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
NoneAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Apache Software Foundation | Apache ActiveMQ Client | affected 5.19.3 semver | Not specified |
| CNA | Apache Software Foundation | Apache ActiveMQ Client | affected 6.0.0 6.2.2 semver | Not specified |
| CNA | Apache Software Foundation | Apache ActiveMQ Broker | affected 5.19.3 semver | Not specified |
| CNA | Apache Software Foundation | Apache ActiveMQ Broker | affected 6.0.0 6.2.2 semver | Not specified |
| CNA | Apache Software Foundation | Apache ActiveMQ All | affected 5.19.3 semver | Not specified |
| CNA | Apache Software Foundation | Apache ActiveMQ All | affected 6.0.0 6.2.2 semver | Not specified |
| CNA | Apache Software Foundation | Apache ActiveMQ Web | affected 5.19.3 semver | Not specified |
| CNA | Apache Software Foundation | Apache ActiveMQ Web | affected 6.0.0 6.2.2 semver | Not specified |
| CNA | Apache Software Foundation | Apache ActiveMQ | affected 5.19.3 semver | Not specified |
| CNA | Apache Software Foundation | Apache ActiveMQ | affected 6.0.0 6.2.2 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| activemq.apache.org/security-advisories.data/CVE-2026-33227-announcement.txt | [email protected] | activemq.apache.org | |
| www.openwall.com/lists/oss-security/2026/04/06/4 | af854a3a-2127-422b-91ae-364da2661108 | www.openwall.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Dawei Wang (en)
There are currently no legacy QID mappings associated with this CVE.