A malicious or compromised HTTP/2 server withholding SETTINGS ACK can send RST_STREAM on a completed stream, planting a null pointer, and then send a PUSH_PROMISE for that stream, causing a null pointer dereference in the QNetworkAccessManager class of the Qt Network module that crashes the application.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
qt qt unaffected
Version Status Constraints
6.8.0 affected ≤ 6.8.9
6.9.0 affected ≤ 6.11.2

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Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://codereview.qt-project.org/c/qt/qtbase/+/759718 cve-icon cve-icon
https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-96432: cve-icon cve-icon
History

Mon, 26 Oct 2026 11:45:00 +0000

Type Values Removed Values Added
Description A malicious or compromised HTTP/2 server withholding SETTINGS ACK can send RST_STREAM on a completed stream, planting a null pointer, and then send a PUSH_PROMISE for that stream, causing a null pointer dereference in the QNetworkAccessManager class of the Qt Network module that crashes the application.
Title Null pointer dereference vulnerability in QNetworkAccessManager impacts Qt
First Time appeared Qt
Qt qt
Qt qtbase
Weaknesses CWE-476
CPEs cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*
Vendors & Products Qt
Qt qt
Qt qtbase
References
Metrics cvssV4_0

{'score': 2.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/RE:L/U:Green'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Qt

Published:

Updated: 2026-10-26T11:31:20.304Z

Reserved: 2026-09-23T06:49:22.184Z

Link: CVE-2026-96432

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-26T12:17:08.420

Modified: 2026-10-26T12:17:08.420

Link: CVE-2026-96432

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-26T12:45:14Z

Weaknesses