Memory Leak Affecting snuba package, versions <26.10.0-r4


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.54% (46th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-SNUBA-21827616
  • published29 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-114613  (opens in a new tab)
CWE-401  (opens in a new tab)

How to fix?

Upgrade Chainguard snuba to version 26.10.0-r4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream snuba package and not the snuba package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1