{"id":"DEBIAN-CVE-2026-42154","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.","modified":"2026-09-11T18:47:36.157060352Z","published":"2026-05-04T19:16:04.397Z","upstream":["CVE-2026-42154"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-42154"}],"affected":[{"package":{"name":"prometheus","ecosystem":"Debian:12","purl":"pkg:deb/debian/prometheus?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.42.0+ds-5","2.42.0+ds-5+deb12u1","2.42.0+ds-6","2.43.1+ds-1","2.44.0+ds-1","2.45.0+ds-1","2.45.0+ds-2","2.45.0+ds-3","2.45.1+ds-1","2.45.1+ds-2","2.45.1+ds-3","2.45.3+ds-1","2.45.3+ds-2","2.45.3+ds-3","2.45.4+ds-1","2.45.4+ds-2","2.45.5+ds-1","2.45.6+ds-1","2.45.6+ds-2","2.45.6+ds-3","2.45.6+ds-4","2.45.6+ds-5","2.45.6+ds-6","2.45.6+ds-7","2.45.6+ds-8","2.45.6+ds-9","2.53.1+ds-1","2.53.1+ds-2","2.53.1+ds-3","2.53.3+ds1-1","2.53.3+ds1-2","2.53.4+ds1-1","2.53.5+ds1-1","2.53.5+ds1-2","2.53.5+ds1-3","2.53.5+ds1-4","2.53.5+ds1-5","3.5.3+ds1-1","3.5.3+ds1-2","3.5.3+ds1-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42154.json"}},{"package":{"name":"prometheus","ecosystem":"Debian:13","purl":"pkg:deb/debian/prometheus?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.53.3+ds1-2","2.53.4+ds1-1","2.53.5+ds1-1","2.53.5+ds1-2","2.53.5+ds1-3","2.53.5+ds1-4","2.53.5+ds1-5","3.5.3+ds1-1","3.5.3+ds1-2","3.5.3+ds1-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42154.json"}},{"package":{"name":"prometheus","ecosystem":"Debian:14","purl":"pkg:deb/debian/prometheus?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.3+ds1-1"}]}],"versions":["2.53.3+ds1-2","2.53.4+ds1-1","2.53.5+ds1-1","2.53.5+ds1-2","2.53.5+ds1-3","2.53.5+ds1-4","2.53.5+ds1-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42154.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}