CVE-2026-33129

MEDIUM

5.9

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.

CVE Details

CVSS v3.1 Score5.9

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published3/20/2026

Last Modified3/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

h3:h3

Weaknesses (CWE)

CWE-208

References

https://github.com/h3js/h3/pull/1283(security-advisories@github.com)

https://github.com/h3js/h3/releases/tag/v2.0.1-rc.9(security-advisories@github.com)

https://github.com/h3js/h3/security/advisories/GHSA-26f5-8h2x-34xh(security-advisories@github.com)

IOC Correlations

No correlations recorded

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