# CVE-2023-46604: Apache ActiveMQ Deserialization of Untrusted Data Vulnerability

- Exploited (CISA KEV): yes, added 2023-11-02, known ransomware use
- Published: 2023-10-27
- CVSS: 10 CRITICAL (v3.1)
- EPSS: 100.0% (100th percentile)
- CWE: CWE-502

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | No public claim | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

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