CVE-2026-90473
6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Summary
msgpack-java through 0.9.12 contains an integer overflow vulnerability in MessageUnpacker.skipValue() when processing MAP32 containers with large element counts. Attackers can supply a MAP32 element count at or above 0x40000000 that wraps when doubled, causing the parser cursor to desynchronize and attacker-controlled data to be returned in place of later fields.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| msgpack | msgpack-java | 0 <= 0.9.12 | affected |
Weaknesses
- CWE-190: Integer Overflow or Wraparound
References
- https://github.com/msgpack/msgpack-java/issues/1014
- https://github.com/msgpack/msgpack-java/blob/v0.9.12/msgpack-core/src/main/java/org/msgpack/core/MessageUnpacker.java#L573-L581
- https://github.com/msgpack/msgpack-java
- https://www.vulncheck.com/advisories/msgpack-java-through-0.9.12-integer-overflow-via-map32
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