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.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade opentelemetry-collector | Jul 7, 2026 | Jul 1, 2026 |
| Alpine Linux | — | Upgrade prometheus | May 5, 2026 | May 4, 2026 |
| Amazon Linux Ami 2 | — | Upgrade amazon-cloudwatch-agent | Jul 8, 2026 | Jul 8, 2026 |
| Redhat_linux | — | Upgrade flightctl-servicesUpgrade flightctl-agentUpgrade flightctl-selinuxUpgrade flightctl-cliUpgrade flightctl-observabilityUpgrade opentelemetry-collector | Jul 3, 2026 | May 4, 2026 |
| Rocky_linux | — | Upgrade opentelemetry-collector | Jul 7, 2026 | Jul 5, 2026 |
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