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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-42154 Detail

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

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/prometheus/prometheus/pull/18584 GitHub, Inc. Issue Tracking  Patch 
https://github.com/prometheus/prometheus/pull/18585 GitHub, Inc. Issue Tracking  Patch 
https://github.com/prometheus/prometheus/releases/tag/v3.11.3 GitHub, Inc. Release Notes 
https://github.com/prometheus/prometheus/releases/tag/v3.5.3 GitHub, Inc. Release Notes 
https://github.com/prometheus/prometheus/security/advisories/GHSA-8rm2-7qqf-34qm GitHub, Inc. Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption GitHub, Inc.  
CWE-789 Memory Allocation with Excessive Size Value GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-42154
NVD Published Date:
05/04/2026
NVD Last Modified:
05/11/2026
Source:
GitHub, Inc.