CVE-2026-33129

EUVD-2026-13668
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub_MCNA
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
h3h3
2.0.0
h3h3
2.0.1:rc1
h3h3
2.0.1:rc2
h3h3
2.0.1:rc3
h3h3
2.0.1:rc4
h3h3
2.0.1:rc5
h3h3
2.0.1:rc6
h3h3
2.0.1:rc7
h3h3
2.0.1:rc8
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/h3js/h3/pull/1283
https://github.com/h3js/h3/releases/tag/v2.0.1-rc.9
https://github.com/h3js/h3/security/advisories/GHSA-26f5-8h2x-34xh