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VULNERABILITIES

CVE-2026-42154 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: redhat-SADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:25039 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:25245 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:29770 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:30651 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:34357 redhat-SADP

see all 52 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource Consumption[email protected]
CWE-770Allocation of Resources Without Limits or Throttlingredhat-SADP
CWE-789Memory Allocation with Excessive Size Value[email protected]

Affected Products

ProductVersions
prometheus prometheus
< 3.5.3
>= 3.6.0, < 3.11.3

CPE

  • cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

44 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-42154
NVD Published Date:
May 4, 2026
NVD Last Modified:
Sep 10, 2026
Source:
[email protected]
CVE-2026-42154 Details - Not Deferred