CVE-2026-33129 is a Timing Side-Channel vulnerability affecting the H3 minimal HTTP framework, specifically versions 2.0.1-beta.0 through 2.0.0-rc.8. Rated MEDIUM with a CVSS score of 5.9, this flaw allows an unauthenticated attacker to deduce basic authentication passwords character-by-character by measuring server response times, effectively bypassing password complexity protections. While there is no evidence of active exploitation, public exploit code, or significant community discussion, the issue is fixed in H3 version 2.0.1-rc.9.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
2.0.0CPE matchmatch criteria | cpe:2.3:a:h3:h3:2.0.0:*:*:*:*:node.js:*:* | ||
2.0.1CPE matchmatch criteria | cpe:2.3:a:h3:h3:2.0.1:rc1:*:*:*:node.js:*:* | ||
2.0.1CPE matchmatch criteria | cpe:2.3:a:h3:h3:2.0.1:rc2:*:*:*:node.js:*:* | ||
2.0.1CPE matchmatch criteria | cpe:2.3:a:h3:h3:2.0.1:rc3:*:*:*:node.js:*:* | ||
2.0.1CPE matchmatch criteria | cpe:2.3:a:h3:h3:2.0.1:rc4:*:*:*:node.js:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
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