{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-33129","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-17T20:35:49.927Z","datePublished":"2026-03-20T09:41:21.933Z","dateUpdated":"2026-03-20T19:33:49.871Z"},"containers":{"cna":{"title":"h3 has an observable timing discrepancy in basic auth utils","problemTypes":[{"descriptions":[{"cweId":"CWE-208","lang":"en","description":"CWE-208: Observable Timing Discrepancy","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/h3js/h3/security/advisories/GHSA-26f5-8h2x-34xh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/h3js/h3/security/advisories/GHSA-26f5-8h2x-34xh"},{"name":"https://github.com/h3js/h3/pull/1283","tags":["x_refsource_MISC"],"url":"https://github.com/h3js/h3/pull/1283"},{"name":"https://github.com/h3js/h3/releases/tag/v2.0.1-rc.9","tags":["x_refsource_MISC"],"url":"https://github.com/h3js/h3/releases/tag/v2.0.1-rc.9"}],"affected":[{"vendor":"h3js","product":"h3","versions":[{"version":">= 2.0.1-beta.0, < 2.0.1-rc.9","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-20T09:41:21.933Z"},"descriptions":[{"lang":"en","value":"H3 is a minimal H(TTP) framework. Versions 2.0.1-beta.0 through 2.0.0-rc.8 contain a Timing Side-Channel vulnerability in the requireBasicAuth function due to the use of unsafe string comparison (!==). This allows an attacker to deduce the valid password character-by-character by measuring the server's response time, effectively bypassing password complexity protections. This issue is fixed in version 2.0.1-rc.9."}],"source":{"advisory":"GHSA-26f5-8h2x-34xh","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-20T19:33:14.795855Z","id":"CVE-2026-33129","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-20T19:33:49.871Z"}}]}}