How severe is CVE-2023-46604?

CVE-2023-46604 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-46604?

Affected package information for CVE-2023-46604 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2023-46604?

No fixed version has been published for CVE-2023-46604 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2023-46604 actively exploited in the wild?

Yes. There are 23 known exploit references for CVE-2023-46604, 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 CVE-2023-46604?

CVE-2023-46604 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 CVE-2023-46604 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2023-46604 (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.

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

CVE-2023-46604

Q: Can O3 Security detect CVE-2023-46604 in my codebase?

Yes. O3 Security's Impact-Aware SCA scanner identifies CVE-2023-46604 across all affected ecosystems (multiple ecosystems), correlates it against your dependency graph, and uses function-level reachability to confirm whether the vulnerable code path is actually reachable in your application — eliminating false positives. You can scan your stack for CVE-2023-46604 directly from the O3 platform.

CRITICAL

Also known asBIT-activemq-2023-46604GHSA-crg9-44h2-xw35

Published

Oct 27, 2023

Updated

Apr 10, 2026

Affected

0 pkgs

Patched

None yet

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.

Description

The Java OpenWire protocol marshaller is vulnerable to Remote Code Execution. This vulnerability may allow a remote attacker with network access to either a Java-based OpenWire broker or client to run arbitrary shell commands by manipulating serialized class types in the OpenWire protocol to cause either the client or the broker (respectively) to instantiate any class on the classpath.

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

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.