CVE-2023-32762

Name: CVE-2023-32762
Creator: NVD / NIST
Published: 2023-05-28T23:15:09.57+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.88%

Last modified Jun 17, 2026

CVE-2023-32762 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An issue was discovered in Qt before 5.15.14, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1. Qt Network incorrectly parses the strict-transport-security (HSTS) header, allowing unencrypted connections to be established, even when explicitly prohibited by the server. EPSS estimates a 0.88% chance of exploitation in the next 30 days.

Description

An issue was discovered in Qt before 5.15.14, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1. Qt Network incorrectly parses the strict-transport-security (HSTS) header, allowing unencrypted connections to be established, even when explicitly prohibited by the server. This happens if the case used for this header does not exactly match.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.88%

54.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Debian	Debian Linux	10.0
Qt	Qt	>= 5.9.0, < 5.15.14
Qt	Qt	>= 6.0.0, < 6.2.9
Qt	Qt	>= 6.3.0, < 6.5.1

References

https://codereview.qt-project.org/c/qt/qtbase/+/476140Patch
https://github.com/qt/qtbase/commit/1b736a815be0222f4b24289cf17575fc15707305Patch
https://lists.debian.org/debian-lts-announce/2024/04/msg00027.htmlThird Party Advisory
https://lists.qt-project.org/pipermail/announce/2023-May/000414.htmlMailing List, Patch
https://codereview.qt-project.org/c/qt/qtbase/+/476140Patch
https://github.com/qt/qtbase/commit/1b736a815be0222f4b24289cf17575fc15707305Patch
https://lists.debian.org/debian-lts-announce/2024/04/msg00027.htmlThird Party Advisory
https://lists.qt-project.org/pipermail/announce/2023-May/000414.htmlMailing List, Patch

Timeline

Published: May 28, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-32762?

How severe is CVE-2023-32762?

CVE-2023-32762 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.88% probability of exploitation in the next 30 days.

How do I fix CVE-2023-32762?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-32762?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST