AUGUST 5, 2026
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Case File

CVE-2025-5991

UNKNOWN · CVSS N/A EPSS 0.12%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-06-11 · Last synced 2026-08-04

CyberRota Analysis

This vulnerability has an unknown severity rating. See the original NVD description below for full technical details.

CVE
CVE-2025-5991
Severity
UNKNOWN
CVSS
N/A
EPSS
0.12%

Original NVD Description

There is a "Use After Free" vulnerability in Qt's QHttp2ProtocolHandler in the QtNetwork module. This only affects HTTP/2 handling, HTTP handling is not affected by this at all. This happens due to a race condition between how QHttp2Stream uploads the body of a POST request and the simultaneous handling of HTTP error responses. This issue only affects Qt 6.9.0 and has been fixed for Qt 6.9.1.