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.
References
| Link | Resource |
|---|---|
| https://github.com/prometheus/prometheus/pull/18584 | Issue Tracking Patch |
| https://github.com/prometheus/prometheus/pull/18585 | Issue Tracking Patch |
| https://github.com/prometheus/prometheus/releases/tag/v3.11.3 | Release Notes |
| https://github.com/prometheus/prometheus/releases/tag/v3.5.3 | Release Notes |
| https://github.com/prometheus/prometheus/security/advisories/GHSA-8rm2-7qqf-34qm | Vendor Advisory |
Configurations
Configuration 1 (hide)
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History
11 May 2026, 17:22
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/prometheus/prometheus/pull/18584 - Issue Tracking, Patch | |
| References | () https://github.com/prometheus/prometheus/pull/18585 - Issue Tracking, Patch | |
| References | () https://github.com/prometheus/prometheus/releases/tag/v3.11.3 - Release Notes | |
| References | () https://github.com/prometheus/prometheus/releases/tag/v3.5.3 - Release Notes | |
| References | () https://github.com/prometheus/prometheus/security/advisories/GHSA-8rm2-7qqf-34qm - Vendor Advisory | |
| First Time |
Prometheus prometheus
Prometheus |
|
| CPE | cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:*:*:* |
04 May 2026, 19:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-04 19:16
Updated : 2026-05-11 17:22
NVD link : CVE-2026-42154
Mitre link : CVE-2026-42154
CVE.ORG link : CVE-2026-42154
JSON object : View
Products Affected
prometheus
- prometheus