CVE-2026-33129
Last modified
CVE-2026-33129 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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 (!==). EPSS estimates a 0.32% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| H3 | H3 | 2.0.0 | — |
| H3 | H3 | 2.0.1 | Rc1 |
References
- https://github.com/h3js/h3/pull/1283Issue Tracking
- https://github.com/h3js/h3/security/advisories/GHSA-26f5-8h2x-34xhExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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