CVE-2026-33129
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| h3js | h3 | >= 2.0.1-beta.0, < 2.0.1-rc.9 | affected |
Weaknesses
- CWE-208: CWE-208: Observable Timing Discrepancy
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: no
- Technical Impact: partial
References
- https://github.com/h3js/h3/security/advisories/GHSA-26f5-8h2x-34xh
- https://github.com/h3js/h3/pull/1283
- https://github.com/h3js/h3/releases/tag/v2.0.1-rc.9
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