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CVE-2026-33129

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:caad9ae88a34ac069c764d93aaf1ff30097c0d30a598c7610d749a2fc067b7b2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"h3","vendor":"h3js","versions":[{"status":"affected","version":">= 2.0.1-beta.0, < 2.0.1-rc.9"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1fb90e43de90e2e5836d5b9fbf881250f41647c3842c4811d7f3968c4be57705 · sha256:debf8df3f4b2952d… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1fb90e43de90e2e5836d5b9fbf881250f41647c3842c4811d7f3968c4be57705 · sha256:debf8df3f4b2952d… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-208","description":"CWE-208: Observable Timing Discrepancy","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1fb90e43de90e2e5836d5b9fbf881250f41647c3842c4811d7f3968c4be57705 · sha256:debf8df3f4b2952d… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/h3js/h3/pull/1283","tags":["x_refsource_MISC"],"url":"https://github.com/h3js/h3/pull/1283"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fb90e43de90e2e5836d5b9fbf881250f41647c3842c4811d7f3968c4be57705 · sha256:debf8df3f4b2952d… · /containers/cna/references/1
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fb90e43de90e2e5836d5b9fbf881250f41647c3842c4811d7f3968c4be57705 · sha256:debf8df3f4b2952d… · /containers/cna/references/2
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fb90e43de90e2e5836d5b9fbf881250f41647c3842c4811d7f3968c4be57705 · sha256:debf8df3f4b2952d… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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