AZL-111044
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-111044.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-111044
- Upstream
- Published
- 2026-10-22T19:17:37Z
- Modified
- 2026-10-27T05:36:16Z
- Summary
- CVE-2026-114613 affecting package python-msgpack 1.0.5-3
- Details
-
MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.3, the msgpack-python C extension (msgpack._cmsgpack) leaks a decoded map value when deserialization rejects a key with strict_map_key=True (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both unpackb() and the streaming Unpacker API are affected. The pure-Python fallback does not exhibit this leak in the reported tests. This issue is fixed in version 1.2.3.
- References