{"id":"CVE-2022-21698","aliases":["GHSA-cg3q-j54f-5p7p","GO-2022-0322"],"url":"https://o3.security/vulnerability/CVE-2022-21698","summary":"Uncontrolled Resource Consumption in promhttp","details":"client_golang is the instrumentation library for Go applications in Prometheus, and the promhttp package in client_golang provides tooling around HTTP servers and clients. In client_golang prior to version 1.11.1, HTTP server is susceptible to a Denial of Service through unbounded cardinality, and potential memory exhaustion, when handling requests with non-standard HTTP methods. In order to be affected, an instrumented software must use any of `promhttp.InstrumentHandler*` middleware except `RequestsInFlight`; not filter any specific methods (e.g GET) before middleware; pass metric with `method` label name to our middleware; and not have any firewall/LB/proxy that filters away requests with unknown `method`. client_golang version 1.11.1 contains a patch for this issue. Several workarounds are available, including removing the `method` label name from counter/gauge used in the InstrumentHandler; turning off affected promhttp handlers; adding custom middleware before promhttp handler that will sanitize the request method given by Go http.Request; and using a reverse proxy or web application firewall, configured to only allow a limited set of methods.","published":"2022-02-15T00:00:00Z","modified":"2026-08-24T17:41:56.663957901Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.05994,"percentile":0.92751,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/prometheus/client_golang","fixedVersion":"1.11.1"}],"fix":{"url":"https://github.com/prometheus/client_golang/pull/962","label":"prometheus/client_golang#962"},"references":[{"type":"WEB","url":"https://github.com/prometheus/client_golang/releases/tag/v1.11.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21698.json"},{"type":"ADVISORY","url":"https://github.com/prometheus/client_golang/security/advisories/GHSA-cg3q-j54f-5p7p"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2IK53GWZ475OQ6ENABKMJMTOBZG6LXUR/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2PFW6Q2LXXWTFRTMTRN4ZGADFRQPKJ3D/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36GUEPA5TPSC57DZTPYPBL6T7UPQ2FRH/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3L6GDN5S5QZSCFKWD3GKL2RDZQ6B4UWA/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4KDETHL5XCT6RZN2BBNOCEXRZ2W3SFU3/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5OGNAFVXSMTTT2UPH6CS3IH6L3KM42Q7/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7V7I72LSQ3IET3QJR6QPAVGJZ4CBDLN5/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AK7CJBCGERCRXYUR2EWDSSDVAQMTAZGX/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLUJZV3HBP56ADXU6QH2V7RNYUPMVBXQ/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FY3N7H6VSDZM37B4SKM2PFFCUWU7QYWN/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLAQRRGNSO5MYCPAXGPH2OCSHOGHSQMQ/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J5WPM42UR6XIBQNQPNQHM32X7S4LJTRX/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBMVIQFKQDSSTHVVJWJ4QH6TW3JVB7XZ/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MH6ALXEQXIFQRQFNJ5Y2MJ5DFPIX76VN/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RN7JGC2LVHPEGSJYODFUV5FEKPBVG4D7/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SASRKYHT5ZFSVMJUQUG3UAEQRJYGJKAR/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZKORFJTRRDJCWBTJPISKKCVMMMJBIRLG/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZY2SLWOQR4ZURQ7UBRZ7JIX6H6F5JHJR/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-21698"},{"type":"FIX","url":"https://github.com/prometheus/client_golang/pull/962"},{"type":"FIX","url":"https://github.com/prometheus/client_golang/pull/987"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-24T17:41:56.663957901Z"}}