{"schema_version":"1.9.0","id":"CVE-2026-42154","published":"2026-05-04T18:13:12.340Z","modified":"2026-09-08T03:46:40.838070175Z","aliases":["BIT-prometheus-2026-42154","GHSA-8rm2-7qqf-34qm","GO-2026-5264"],"related":["ALSA-2026:34357","ALSA-2026:34359","SUSE-SU-2026:2243-1","SUSE-SU-2026:2768-1","SUSE-SU-2026:2774-1","openSUSE-SU-2026:10676-1","openSUSE-SU-2026:21483-1"],"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.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/prometheus/prometheus","events":[{"introduced":"0"},{"fixed":"dcd3d551ced8b8dc14e0217f8cb14e547109cd5f"},{"introduced":"491734606591ef8c188f5489c70380805bc868c0"},{"fixed":"eb173f5256d4022afba1e9bc3d19740a76859fae"}],"database_specific":{"cpe":"cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"3.5.3"},{"introduced":"3.6.0"},{"fixed":"3.11.3"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v3.11.2","v0.311.2","v3.5.2","v0.305.2","v3.11.1","v0.311.1","v3.11.0","v0.311.0","v3.5.1","v0.305.1","v3.5.0","v0.305.0","v3.5.0-rc.1","v3.5.0-rc.0","v3.0.0-beta.1","v0.300.0-beta.1","v2.43.0-rc.0","v0.43.0-rc.0","v2.34.0-rc.0","v2.32.0-beta.0","v2.22.0-rc.0","v2.13.0-rc.0","v2.12.0-rc.0","v2.11.0-rc.0","v2.10.0-rc.0","v2.9.0","v2.9.0-rc.0","v2.8.0","v2.8.0-rc.0","v2.7.0","v2.7.0-rc.2","v2.7.0-rc.1","v2.7.0-rc.0","v2.6.0","v2.6.0-rc.1","v2.6.0-rc.0","v2.5.0-rc.0","v2.4.0","v2.4.0-rc.0","v2.2.0","v2.2.0-rc.1","v2.2.0-rc.0","v2.1.0","discovery-handle-discoverer-updates","dev","v2.0.0-rc.3","v2.0.0-rc.2","v2.0.0-rc.1","v2.0.0-rc.0","v2.0.0-beta.5","v2.0.0-beta.4","v2.0.0-beta.2","v2.0.0-beta.1","v2.0.0-beta.0","v2.0.0-alpha.3","v2.0.0-alpha.2","v2.0.0-alpha.1","v2.0.0-alpha.0","v1.4.1","v1.4.0","v1.3.0-beta.0","v1.1.0","v1.0.0-rc.0","0.18.0","0.18.0rc1","0.16.0","0.16.0rc2","0.16.0rc1","0.15.0","0.15.0rc3","0.15.1","0.15.0rc2","0.15.0rc1","0.14.0","0.14.0rc3","0.14.0rc2","0.14.0rc1","0.13.2","0.13.1","0.13.0","0.13.0rc2","0.12.0","0.11.1","0.10.0","0.9.0","0.9.0rc5","0.9.0rc4","0.9.0rc3","0.9.0rc2","0.9.0rc1","0.8.0","0.7.0","0.6.0","0.5.0","0.4.0","0.3.0","0.2.1","0.2.0","checkout","0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42154.json"}}],"references":[{"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://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42154.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:25039"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:25245"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:29770"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:30651"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34357"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34359"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34364"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34794"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36651"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36796"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40118"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40262"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40792"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40945"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40970"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40972"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40974"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41019"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41030"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41031"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41066"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42146"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42796"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42852"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:43052"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:44235"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:44263"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:44622"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:47149"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:47728"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:47952"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:48699"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50758"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50843"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:53412"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:53413"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:53415"},{"type":"ADVISORY","url"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