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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-42154

Prometheus: remote read endpoint allows denial of service via crafted snappy payload

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

Prometheus is an open-source monitoring system and time series database. Prior to versions 3.5.3 and 3.11.3, the remote read endpoint (/api/v1/read) does not validate the declared decoded length in a snappy-compressed request body before allocating memory. An unauthenticated attacker can send a small payload that causes a huge heap allocation per request. Under concurrent load this can exhaust available memory and crash the Prometheus process. This issue has been patched in versions 3.5.3 and 3.11.3.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

prometheus prometheus

  • < 3.5.3affected
  • >= 3.6.0, < 3.11.3affected

References