CVE-2026-16762

CVE-2026-16762 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. The underlying weakness is classified as CWE-407.

Key facts

Description

An attacker able to supply a crafted XML document to an application using QXmlStreamReader can cause disproportionate CPU consumption during parsing, making the application unresponsive (denial of service). Exploitation requires only that the application parse attacker-influenced XML; no authentication, privileges, or user interaction beyond ingesting the input are needed. There is no loss of confidentiality or integrity — no data disclosure, data modification, or code execution — and the impact is contained to the affected process.

Frequently asked questions

What is CVE-2026-16762?
An attacker able to supply a crafted XML document to an application using QXmlStreamReader can cause disproportionate CPU consumption during parsing, making the application unresponsive (denial of service). Exploitation requires only that the application parse attacker-influenced XML; no authentication, privileges, or user interaction beyond ingesting the input are needed. There is no loss of confidentiality or integrity — no data disclosure, data modification, or code execution — and the impact is contained to the affected process.
How severe is CVE-2026-16762?
CVE-2026-16762 has a CVSS 4.0 base score of 8.7, rated high severity.
Is CVE-2026-16762 being actively exploited?
It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.
How do I fix CVE-2026-16762?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-16762 published?
CVE-2026-16762 was published on 2026-10-23.

References

Other CWE-407 vulnerabilities

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