CVE-2023-34410

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-05 · updated 2026-06-17
Weakness: CWE-295

Description

An issue was discovered in Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.2. Certificate validation for TLS does not always consider whether the root of a chain is a configured CA certificate.

Affected products

Debian Linux: 10.0
Fedoraproject Fedora: 38
Qt: from 5.13.0 before 5.15.15; from 6.0.0 before 6.2.9; from 6.3.0 before 6.5.2 — fixed in 5.15.15, 6.2.9, 6.5.2

How to fix

Upgrade to a fixed version: Qt 5.15.15, 6.2.9, 6.5.2. Check the vendor advisory for mitigations.

References

https://codereview.qt-project.org/c/qt/qtbase/+/477560
https://codereview.qt-project.org/c/qt/qtbase/+/480002
https://lists.debian.org/debian-lts-announce/2023/08/msg00028.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UE3IHQZCEUFVOPWG75V2HDKXNUZBB4FX/
https://codereview.qt-project.org/c/qt/qtbase/+/477560
https://codereview.qt-project.org/c/qt/qtbase/+/480002
https://lists.debian.org/debian-lts-announce/2023/08/msg00028.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UE3IHQZCEUFVOPWG75V2HDKXNUZBB4FX/

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