{"id":"BIT-prometheus-2026-42154","summary":"Prometheus: remote read endpoint allows denial of service via crafted snappy payload","details":"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.","aliases":["CVE-2026-42154","GHSA-8rm2-7qqf-34qm"],"modified":"2026-05-06T09:56:07.738382576Z","published":"2026-05-06T08:50:03.007Z","database_specific":{"cpes":["cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:go:*:*"],"severity":"High"},"references":[{"type":"WEB","url":"https://github.com/prometheus/prometheus/pull/18584"},{"type":"WEB","url":"https://github.com/prometheus/prometheus/pull/18585"},{"type":"WEB","url":"https://github.com/prometheus/prometheus/releases/tag/v3.11.3"},{"type":"WEB","url":"https://github.com/prometheus/prometheus/releases/tag/v3.5.3"},{"type":"WEB","url":"https://github.com/prometheus/prometheus/security/advisories/GHSA-8rm2-7qqf-34qm"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42154"}],"affected":[{"package":{"name":"prometheus","ecosystem":"Bitnami","purl":"pkg:bitnami/prometheus"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.5.3"},{"introduced":"3.6.0"},{"fixed":"3.11.3"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/prometheus/BIT-prometheus-2026-42154.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"schema_version":"1.7.5"}