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.
Published: 2026-05-04
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Github GHSA Github GHSA GHSA-8rm2-7qqf-34qm Prometheus: Remote read endpoint allows denial of service via crafted snappy payload
History

Mon, 11 May 2026 17:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:*:*:*

Mon, 04 May 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 04 May 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Prometheus
Prometheus prometheus
Vendors & Products Prometheus
Prometheus prometheus

Mon, 04 May 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title Prometheus: remote read endpoint allows denial of service via crafted snappy payload
Weaknesses CWE-400
CWE-789
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Prometheus Prometheus
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-04T20:19:13.876Z

Reserved: 2026-04-24T17:15:21.835Z

Link: CVE-2026-42154

cve-icon Vulnrichment

Updated: 2026-05-04T20:18:51.965Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-04T19:16:04.397

Modified: 2026-05-11T17:22:42.860

Link: CVE-2026-42154

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-04T20:30:08Z

Weaknesses