CVE-2021-4040
org.apache.activemq:artemis-core-client Vulnerable to Out-of-Bounds Write
A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
NVD Score used
A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
- Record
CVE-2021-4040- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-400, CWE-787
- Updated
- 2026-11-02
CVE List No score
A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
- Record
CVE-2021-4040- Weakness
- CWE-400
- Updated
- 2026-11-02
EUVDEUVD-2022-6556 No score
A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
- Record
EUVD-2022-6556- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gf8c-j759-86mg
org.apache.activemq:artemis-core-client Vulnerable to Out-of-Bounds Write
A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
- Record
GHSA-gf8c-j759-86mg- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-400, CWE-787
- Updated
- 2026-11-02
OSV
A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
- Record
CVE-2021-4040- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
OSVGHSA-gf8c-j759-86mg
org.apache.activemq:artemis-core-client Vulnerable to Out-of-Bounds Write
A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
- Record
GHSA-gf8c-j759-86mg- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-400, CWE-787
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.activemq:artemis-core-clientMaven |
before 2.19.1 | 2.19.1 |
org.apache.activemq:artemis-core-clientMaven |
before 2.19.1, plus listed versions 1.0.01.1.01.2.01.3.01.4.0 Show 33 moreShow less1.5.01.5.11.5.21.5.31.5.41.5.51.5.62.0.02.1.02.10.02.10.12.11.02.12.02.13.02.14.02.15.02.16.02.17.02.18.02.19.02.2.02.3.02.4.02.5.02.6.02.6.12.6.22.6.32.6.42.7.02.8.02.8.12.9.0 |
2.19.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-4040 is a medium vulnerability (CVSS 5.3) in Apache Artemis, published August 24, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.19%, the 88th percentile. Fixed in org.apache.activemq:artemis-core-client 2.19.1.