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Critical severity9.1NVD Advisory· Published Apr 1, 2026· Updated Jun 5, 2026

CVE-2026-34873

CVE-2026-34873

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3

Arm/MbedTLS2 versions
cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*range: >=3.5.0,<3.6.6
- (no CPE)range: 3.5.0-4.0.0
osv-coords
pkg:rpm/opensuse/mbedtls&distro=openSUSE%20Tumbleweed
Range: < 3.6.6-1.1

Patches

Vulnerability mechanics

References

2

mbed-tls.readthedocs.io/en/latest/security-advisories/nvdVendor Advisory
mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2026-03-client-impersonation-while-resuming-tls13-session/nvdVendor Advisory

News mentions

0

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