Bug 2449583 (CVE-2026-33129) - CVE-2026-33129 h3: H3: Password deduction via Timing Side-Channel vulnerability in basic authentication
Summary: CVE-2026-33129 h3: H3: Password deduction via Timing Side-Channel vulnerabili...
Keywords:
Status: NEW
Alias: CVE-2026-33129
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On: 2449665
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-20 11:02 UTC by OSIDB Bzimport
Modified: 2026-03-20 17:34 UTC (History)
0 users

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Description OSIDB Bzimport 2026-03-20 11:02:16 UTC 
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.
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