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
Configurations
Configuration 1 (hide)
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History
21 Jul 2026, 12:18
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17 Jul 2026, 13:18
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16 Jul 2026, 12:17
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14 Jul 2026, 12:17
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09 Jul 2026, 13:17
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02 Jul 2026, 12:17
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30 Jun 2026, 03:19
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| CWE | CWE-770 |
11 May 2026, 17:22
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| 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 |
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| CPE | cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:*:*:* |
04 May 2026, 19:16
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| New CVE |
Information
Published : 2026-05-04 19:16
Updated : 2026-07-21 12:18
NVD link : CVE-2026-42154
Mitre link : CVE-2026-42154
CVE.ORG link : CVE-2026-42154
JSON object : View
Products Affected
prometheus
- prometheus
