Advisory details:
github_osv / GHSA-c825-6ph3-4h84
| Advisory ID | github_osv/GHSA-c825-6ph3-4h84 |
| Aliases |
CVE-2025-66168
|
| Summary | Apache ActiveMQ is Vulnerable to Integer Overflow or Wraparound Apache ActiveMQ does not properly validate the remaining length field which may lead to an overflow during the decoding of malformed packets. When this integer overflow occurs, ActiveMQ may incorrectly compute the total Remaining Length and subsequently misinterpret the payload as multiple MQTT control packets which makes the broker susceptible to unexpected behavior when interacting with non-compliant clients. This behavior violates the MQTT v3.1.1 specification, which restricts Remaining Length to a maximum of 4 bytes. The scenario occurs on established connections after the authentication process. Brokers that are not enabling mqtt transport connectors are not impacted. This issue affects Apache ActiveMQ: before 5.19.2, 6.0.0 to 6.1.8, and 6.2.0 Users are recommended to upgrade to version 5.19.2, 6.1.9, or 6.2.1, which fixes the issue. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 4.9 |
| Risk | 2.5 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| CWE-190 | Integer Overflow or Wraparound |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 5.4 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-c825-6ph3-4h84/GHSA-c825-6ph3-4h84.json |
| generic_textual | MODERATE |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/apache/activemq | ||
| http://www.openwall.com/lists/oss-security/2026/03/03/5 | ||
| 13n8mkrb2jf2y6yyhpgrkmpqcm7djyto | Advisory | https://lists.apache.org/thread/13n8mkrb2jf2y6yyhpgrkmpqcm7djyto |
| CVE-2025-66168 | https://nvd.nist.gov/vuln/detail/CVE-2025-66168 | |
| CVE-2026-40046-announcement.txt | Other | https://activemq.apache.org/security-advisories.data/CVE-2026-40046-announcement.txt |
| CVERecord?id=CVE-2026-40046 | Other | https://www.cve.org/CVERecord?id=CVE-2026-40046 |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-04T20:27:42Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2025/66xxx/CVE-2025-66168.json
Source Advisory: vulnrichment/CVE-2025-66168
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]