Bug 2454108 (CVE-2026-34873) - CVE-2026-34873 mbedtls: Mbed TLS: Client impersonation during TLS 1.3 session resumption
Summary: CVE-2026-34873 mbedtls: Mbed TLS: Client impersonation during TLS 1.3 session...
Keywords:
Status: NEW
Alias: CVE-2026-34873
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2454191 2454192 2454193 2454194 2454196
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-01 21:02 UTC by OSIDB Bzimport
Modified: 2026-04-02 05:55 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-04-01 21:02:57 UTC 
An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1.3 session.
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