How severe is GHSA-crg9-44h2-xw35?

GHSA-crg9-44h2-xw35 has a CVSS score of 10/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by GHSA-crg9-44h2-xw35?

GHSA-crg9-44h2-xw35 affects the following packages: org.apache.activemq:activemq-client (Maven), org.apache.activemq:activemq-client (Maven), org.apache.activemq:activemq-client (Maven), org.apache.activemq:activemq-client (Maven), org.apache.activemq:activemq-openwire-legacy (Maven), org.apache.activemq:activemq-openwire-legacy (Maven), org.apache.activemq:activemq-openwire-legacy (Maven), org.apache.activemq:activemq-openwire-legacy (Maven). Ecosystems affected: Maven.

How do I fix GHSA-crg9-44h2-xw35?

Update org.apache.activemq:activemq-client to version 5.15.16 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Is GHSA-crg9-44h2-xw35 actively exploited in the wild?

Yes. There are 23 known exploit references for GHSA-crg9-44h2-xw35, including 13 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-crg9-44h2-xw35?

GHSA-crg9-44h2-xw35 has an EPSS (Exploit Prediction Scoring System) score of 94.4%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is GHSA-crg9-44h2-xw35 in the CISA Known Exploited Vulnerabilities catalog?

Yes. GHSA-crg9-44h2-xw35 (Apache ActiveMQ Deserialization of Untrusted Data Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2023-11-02. CISA required all US federal civilian agencies to remediate this vulnerability by 2023-11-23. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is GHSA-crg9-44h2-xw35?

GHSA-crg9-44h2-xw35 is classified as Deserialization of Untrusted Data (CWE-502). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-crg9-44h2-xw35 published, and has it been updated?

GHSA-crg9-44h2-xw35 was published on October 27, 2023 and was last updated on November 4, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2023-11-02 — agencies required to remediate by 2023-11-23 · Ransomware

☕ Maven

GHSA-crg9-44h2-xw35

CRITICAL

Apache ActiveMQ is vulnerable to Remote Code Execution

Also known asBIT-activemq-2023-46604CVE-2023-46604

Published

Oct 27, 2023

Updated

Nov 4, 2025

Affected

8 pkgs

Patched

8 / 8

Exploits

23 known

EPSS Exploitation Probability

via FIRST.org ↗

94.4%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

8 pkgs affected

☕org.apache.activemq:activemq-client☕org.apache.activemq:activemq-client☕org.apache.activemq:activemq-client☕org.apache.activemq:activemq-client☕org.apache.activemq:activemq-openwire-legacy☕org.apache.activemq:activemq-openwire-legacy☕org.apache.activemq:activemq-openwire-legacy☕org.apache.activemq:activemq-openwire-legacy

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Apache ActiveMQ is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker with network access to a broker to run arbitrary shell commands by manipulating serialized class types in the OpenWire protocol to cause the broker to instantiate any class on the classpath.

Users are recommended to upgrade to version 5.15.16, 5.16.7, 5.17.6, or 5.18.3, which fixes this issue.

Affected Packages

8 total 8 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.activemq:activemq-client`	all versions	5.15.16
☕Maven	`org.apache.activemq:activemq-client`	≥ 5.16.0&&< 5.16.7	5.16.7
☕Maven	`org.apache.activemq:activemq-client`	≥ 5.17.0&&< 5.17.6	5.17.6
☕Maven	`org.apache.activemq:activemq-client`	≥ 5.18.0&&< 5.18.3	5.18.3
☕Maven	`org.apache.activemq:activemq-openwire-legacy`	≥ 5.8.0&&< 5.15.16	5.15.16
☕Maven	`org.apache.activemq:activemq-openwire-legacy`	≥ 5.16.0&&< 5.16.7	5.16.7

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.