MessagePack: Unbounded memory leak in msgpack C extension on strict_map_key validation failure
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| msgpack | msgpack-python | affected |
|
No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Msgpack | Msgpack-python |
|
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-j586-36cw-2gc2 | MessagePack: Unbounded memory leak in msgpack C extension on strict_map_key validation failure |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.543% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-772 | |
| References |
| |
| Metrics |
threat_severity
|
threat_severity
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Msgpack
Msgpack msgpack-python |
|
| Vendors & Products |
Msgpack
Msgpack msgpack-python |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | MessagePack: Unbounded memory leak in msgpack C extension on strict_map_key validation failure | |
| Weaknesses | CWE-401 | |
| References |
| |
| Metrics |
cvssV3_1
|