{"api_version":"1","generated_at":"2026-09-08T03:47:01+00:00","cve":"CVE-2026-11352","urls":{"html":"https://cve.report/CVE-2026-11352","api":"https://cve.report/api/cve/CVE-2026-11352.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-11352","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-11352"},"summary":{"title":"QUIC zero-length UDP datagrams busy-loop","description":"An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server\nto trigger a remote denial of service against a curl or libcurl client.\nBecause the helper function discards zero-length UDP datagrams before counting\nthem toward the per-call packet budget, a connected QUIC peer can continuously\nstream empty datagrams to indefinitely stall the client.","state":"PUBLISHED","assigner":"curl","published_at":"2026-07-03 07:16:23","updated_at":"2026-07-07 18:01:19"},"problem_types":["CWE-835","CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","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","data":{"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"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","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","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://hackerone.com/reports/3783438","name":"https://hackerone.com/reports/3783438","refsource":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Issue Tracking","Third Party Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://curl.se/docs/CVE-2026-11352.html","name":"https://curl.se/docs/CVE-2026-11352.html","refsource":"2499f714-1537-4658-8207-48ae4bb9eae9","tags":["Patch","Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://curl.se/docs/CVE-2026-11352.json","name":"https://curl.se/docs/CVE-2026-11352.json","refsource":"2499f714-1537-4658-8207-48ae4bb9eae9","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-11352","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11352","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"curl","product":"curl","version":"affected 8.20.0 8.20.0 semver","platforms":[]},{"source":"CNA","vendor":"curl","product":"curl","version":"affected 8.19.0 8.19.0 semver","platforms":[]},{"source":"CNA","vendor":"curl","product":"curl","version":"affected 8.18.0 8.18.0 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"vectorqueue on hackerone (AntAISecurityLab)","lang":"en"},{"source":"CNA","value":"Stefan Eissing","lang":"en"}],"nvd_cpes":[{"cve_year":"2026","cve_id":"11352","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"haxx","cpe5":"curl","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"11352","cve":"CVE-2026-11352","epss":"0.010100000","percentile":"0.590130000","score_date":"2026-07-09","updated_at":"2026-07-10 00:08:29"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"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"}},{"other":{"content":{"id":"CVE-2026-11352","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-07-06T18:26:03.249042Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-07-06T18:27:49.432Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"references":[{"tags":["exploit"],"url":"https://hackerone.com/reports/3783438"}],"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"curl","vendor":"curl","versions":[{"lessThanOrEqual":"8.20.0","status":"affected","version":"8.20.0","versionType":"semver"},{"lessThanOrEqual":"8.19.0","status":"affected","version":"8.19.0","versionType":"semver"},{"lessThanOrEqual":"8.18.0","status":"affected","version":"8.18.0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"finder","value":"vectorqueue on hackerone (AntAISecurityLab)"},{"lang":"en","type":"remediation developer","value":"Stefan Eissing"}],"descriptions":[{"lang":"en","value":"An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server\nto trigger a remote denial of service against a curl or libcurl client.\nBecause the helper function discards zero-length UDP datagrams before counting\nthem toward the per-call packet budget, a connected QUIC peer can continuously\nstream empty datagrams to indefinitely stall the client."}],"problemTypes":[{"descriptions":[{"description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en"}]}],"providerMetadata":{"dateUpdated":"2026-07-03T06:12:10.777Z","orgId":"2499f714-1537-4658-8207-48ae4bb9eae9","shortName":"curl"},"references":[{"name":"json","url":"https://curl.se/docs/CVE-2026-11352.json"},{"name":"www","url":"https://curl.se/docs/CVE-2026-11352.html"},{"name":"issue","url":"https://hackerone.com/reports/3783438"}],"title":"QUIC zero-length UDP datagrams busy-loop"}},"cveMetadata":{"assignerOrgId":"2499f714-1537-4658-8207-48ae4bb9eae9","assignerShortName":"curl","cveId":"CVE-2026-11352","datePublished":"2026-07-03T06:12:10.777Z","dateReserved":"2026-06-05T11:23:43.389Z","dateUpdated":"2026-07-06T18:27:49.432Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-03 07:16:23","lastModifiedDate":"2026-07-07 18:01:19","problem_types":["CWE-835","CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-06T18:26:03.249042Z","id":"CVE-2026-11352","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*","versionStartIncluding":"8.18.0","versionEndExcluding":"8.21.0","matchCriteriaId":"6EF934FA-9E74-432D-A41E-157D65C6B539"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"11352","Ordinal":"1","Title":"QUIC zero-length UDP datagrams busy-loop","CVE":"CVE-2026-11352","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"11352","Ordinal":"1","NoteData":"An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server\nto trigger a remote denial of service against a curl or libcurl client.\nBecause the helper function discards zero-length UDP datagrams before counting\nthem toward the per-call packet budget, a connected QUIC peer can continuously\nstream empty datagrams to indefinitely stall the client.","Type":"Description","Title":"QUIC zero-length UDP datagrams busy-loop"}]}}}