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MessagePack for Java Vulnerable to Remote DoS via Malicious EXT Payload Allocation
MessagePack for Java Vulnerable to Remote DoS via Malicious EXT Payload Allocation
Affected packages
- org.msgpack:msgpack-core— before 0.9.11
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/msgpack/msgpack-java/security/advisories/GHSA-cw39-r4h6-8j3x
- https://nvd.nist.gov/vuln/detail/CVE-2026-21452
- https://github.com/msgpack/msgpack-java/commit/daa2ea6b2f11f500e22c70a22f689f7a9debdeae
- https://github.com/msgpack/msgpack-java
- https://github.com/msgpack/msgpack-java/releases/tag/v0.9.11
Structured record: https://osv.dev/vulnerability/GHSA-cw39-r4h6-8j3x
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