CVE-2023-46604
Apache ActiveMQ Deserialization of Untrusted Data Vulnerability
IN CISA KEV
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.
- Vendor
- Apache
- Product
- ActiveMQ
- CVSS 3.1
- 9.8 (critical), scored by NVD (primary)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1
- 10 (critical), scored by security@apache.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H
- CWE
- CWE-502
- Published
- 2023-10-27
- NVD modified
- 2026-06-17
- NVD status
- Analyzed
CISA KEV
- Date added
- 2023-11-02
- Due date
- 2023-11-23
- Ransomware use
- Known
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS
100% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- seclists.org (Mailing List, Third Party Advisory)
- activemq.apache.org (Vendor Advisory)
- lists.debian.org (Mailing List)
- security.netapp.com (Third Party Advisory)
- www.openwall.com (Mailing List)
- seclists.org (Mailing List, Third Party Advisory)
- activemq.apache.org (Vendor Advisory)
- lists.debian.org (Mailing List)
- lists.debian.org (Mailing List)
- security.netapp.com (Third Party Advisory)
- www.openwall.com (Mailing List)
- www.cisa.gov (Third Party Advisory, US Government Resource)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.