{"id":"CVE-2026-63452","state":"PUBLISHED","title":"Suricata http1: repeated brotli compression bombs can cause excessive CPU consumption","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the HTTP/1 parser limits decompression work per transaction but does not limit how many small brotli compression bombs a single flow can submit. With response-body-decompress-layer-limit enabled, repeated compressed responses make the decompression paths in rust/htp perform expensive work for every transaction, degrading packet processing and potentially causing loss of monitoring visibility or denial of service. This issue is fixed in version 8.0.6.","publishedAt":"2026-09-18T20:16:51.951Z","updatedAt":"2026-09-21T18:19:52.084Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["OISF suricata"],"affected":[{"vendor":"OISF","product":"suricata","versions":[{"version":">= 8.0.0, < 8.0.6","status":"affected"}]}],"references":["https://github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84","https://github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f","https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88","https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","https://redmine.openinfosecfoundation.org/issues/8694"],"weaknesses":["CWE-400","CWE-409"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63452.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63452","state":"PUBLISHED","datePublished":"2026-09-18T20:16:51.951Z","dateUpdated":"2026-09-21T18:19:52.084Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-16T19:35:57.768Z"},"containers":{"cna":{"title":"Suricata http1: repeated brotli compression bombs can cause excessive CPU consumption","descriptions":[{"lang":"en","value":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the HTTP/1 parser limits decompression work per transaction but does not limit how many small brotli compression bombs a single flow can submit. With response-body-decompress-layer-limit enabled, repeated compressed responses make the decompression paths in rust/htp perform expensive work for every transaction, degrading packet processing and potentially causing loss of monitoring visibility or denial of service. This issue is fixed in version 8.0.6."}],"affected":[{"vendor":"OISF","product":"suricata","versions":[{"version":">= 8.0.0, < 8.0.6","status":"affected"}]}],"references":[{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84","name":"https://github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f","name":"https://github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f","tags":["x_refsource_MISC"]},{"url":"https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88","name":"https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88","tags":["x_refsource_MISC"]},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","name":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","tags":["x_refsource_MISC"]},{"url":"https://redmine.openinfosecfoundation.org/issues/8694","name":"https://redmine.openinfosecfoundation.org/issues/8694","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-409","lang":"en","description":"CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-18T20:16:51.951Z"},"source":{"advisory":"GHSA-j9cx-w9xm-5x84","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-21T18:19:39.620230Z","id":"CVE-2026-63452","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-21T18:19:52.084Z"}}]}}}