{"id":"CVE-2026-44160","state":"PUBLISHED","title":"Fluentd: Denial of Service (DoS) via Gzip Decompression Bomb in `in_http` and `in_forward`","description":"Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd's in_http and in_forward plugins support gzip-compressed data but enforce limits only on compressed payloads through settings such as body_size_limit and chunk_size_limit, allowing crafted compressed payloads to decompress in memory to an excessive size and cause denial of service through memory exhaustion. This issue is fixed in version 1.19.3.","publishedAt":"2026-07-08T21:24:28.346Z","updatedAt":"2026-07-09T19:34:55.352Z","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":["fluent fluentd"],"affected":[{"vendor":"fluent","product":"fluentd","versions":[{"version":"< 1.19.3","status":"affected"}]}],"references":["https://github.com/fluent/fluentd/security/advisories/GHSA-j9cw-hwqf-85w7","https://github.com/fluent/fluentd/pull/5393","https://github.com/fluent/fluentd/commit/f5f2b7cddf8aab3932e6dec9fa367a5f3eb27e10","https://github.com/fluent/fluentd/releases/tag/v1.19.3"],"weaknesses":["CWE-409"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/44xxx/CVE-2026-44160.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-44160","state":"PUBLISHED","datePublished":"2026-07-08T21:24:28.346Z","dateUpdated":"2026-07-09T19:34:55.352Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-05T14:39:34.922Z"},"containers":{"cna":{"title":"Fluentd: Denial of Service (DoS) via Gzip Decompression Bomb in `in_http` and `in_forward`","descriptions":[{"lang":"en","value":"Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd's in_http and in_forward plugins support gzip-compressed data but enforce limits only on compressed payloads through settings such as body_size_limit and chunk_size_limit, allowing crafted compressed payloads to decompress in memory to an excessive size and cause denial of service through memory exhaustion. This issue is fixed in version 1.19.3."}],"affected":[{"vendor":"fluent","product":"fluentd","versions":[{"version":"< 1.19.3","status":"affected"}]}],"references":[{"url":"https://github.com/fluent/fluentd/security/advisories/GHSA-j9cw-hwqf-85w7","name":"https://github.com/fluent/fluentd/security/advisories/GHSA-j9cw-hwqf-85w7","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/fluent/fluentd/pull/5393","name":"https://github.com/fluent/fluentd/pull/5393","tags":["x_refsource_MISC"]},{"url":"https://github.com/fluent/fluentd/commit/f5f2b7cddf8aab3932e6dec9fa367a5f3eb27e10","name":"https://github.com/fluent/fluentd/commit/f5f2b7cddf8aab3932e6dec9fa367a5f3eb27e10","tags":["x_refsource_MISC"]},{"url":"https://github.com/fluent/fluentd/releases/tag/v1.19.3","name":"https://github.com/fluent/fluentd/releases/tag/v1.19.3","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-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":"2026-07-08T21:24:28.346Z"},"source":{"advisory":"GHSA-j9cw-hwqf-85w7","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T19:34:49.901088Z","id":"CVE-2026-44160","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":"2026-07-09T19:34:55.352Z"}}]}}}