{"api_version":"1","generated_at":"2026-04-23T02:37:10+00:00","cve":"CVE-2026-33870","urls":{"html":"https://cve.report/CVE-2026-33870","api":"https://cve.report/api/cve/CVE-2026-33870.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-33870","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-33870"},"summary":{"title":"Netty: HTTP Request Smuggling via Chunked Extension Quoted-String Parsing","description":"Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-03-27 20:16:34","updated_at":"2026-03-30 20:12:16"},"problem_types":["CWE-444","CWE-444 CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"references":[{"url":"https://w4ke.info/2025/10/29/funky-chunks-2.html","name":"https://w4ke.info/2025/10/29/funky-chunks-2.html","refsource":"security-advisories@github.com","tags":["Technical Description"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8","name":"https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8","refsource":"security-advisories@github.com","tags":["Exploit","Mitigation","Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://w4ke.info/2025/06/18/funky-chunks.html","name":"https://w4ke.info/2025/06/18/funky-chunks.html","refsource":"security-advisories@github.com","tags":["Technical Description"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.rfc-editor.org/rfc/rfc9110","name":"https://www.rfc-editor.org/rfc/rfc9110","refsource":"security-advisories@github.com","tags":["Technical Description"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33870","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33870","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"netty","product":"netty","version":"affected < 4.1.132.Final","platforms":[]},{"source":"CNA","vendor":"netty","product":"netty","version":"affected >= 4.2.0.Alpha1, < 4.2.10.Final","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"33870","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"netty","cpe5":"netty","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-33870","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-03-31T13:55:28.970197Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-03-31T13:55:47.863Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"netty","vendor":"netty","versions":[{"status":"affected","version":"< 4.1.132.Final"},{"status":"affected","version":">= 4.2.0.Alpha1, < 4.2.10.Final"}]}],"descriptions":[{"lang":"en","value":"Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-444","description":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-03-27T19:54:15.586Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/netty/netty/security/advisories/GHSA-pwqr-wmgm-9rr8"},{"name":"https://w4ke.info/2025/06/18/funky-chunks.html","tags":["x_refsource_MISC"],"url":"https://w4ke.info/2025/06/18/funky-chunks.html"},{"name":"https://w4ke.info/2025/10/29/funky-chunks-2.html","tags":["x_refsource_MISC"],"url":"https://w4ke.info/2025/10/29/funky-chunks-2.html"},{"name":"https://www.rfc-editor.org/rfc/rfc9110","tags":["x_refsource_MISC"],"url":"https://www.rfc-editor.org/rfc/rfc9110"}],"source":{"advisory":"GHSA-pwqr-wmgm-9rr8","discovery":"UNKNOWN"},"title":"Netty: HTTP Request Smuggling via Chunked Extension Quoted-String Parsing"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-33870","datePublished":"2026-03-27T19:54:15.586Z","dateReserved":"2026-03-24T15:10:05.678Z","dateUpdated":"2026-03-31T13:55:47.863Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-27 20:16:34","lastModifiedDate":"2026-03-30 20:12:16","problem_types":["CWE-444","CWE-444 CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*","versionEndExcluding":"4.1.132","matchCriteriaId":"8F551B7E-5E29-4062-8FDB-AA1377B3E8F5"},{"vulnerable":true,"criteria":"cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2.0","versionEndExcluding":"4.2.10","matchCriteriaId":"419E92FA-6271-4613-AF3D-CF09ADFF2E13"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"33870","Ordinal":"1","Title":"Netty: HTTP Request Smuggling via Chunked Extension Quoted-Strin","CVE":"CVE-2026-33870","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"33870","Ordinal":"1","NoteData":"Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, Netty incorrectly parses quoted strings in HTTP/1.1 chunked transfer encoding extension values, enabling request smuggling attacks. Versions 4.1.132.Final and 4.2.10.Final fix the issue.","Type":"Description","Title":"Netty: HTTP Request Smuggling via Chunked Extension Quoted-Strin"}]}}}