# CVE-2026-97845: Uncontrolled recursion vulnerability in QXmlSimpleReader XML parsing impacts Qt

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

An uncontrolled recursion vulnerability has been discovered in the Qt QXmlSimpleReader XML parsing functionality of the Qt 5 Core Compatibility APIs module (Qt 6) and the Qt XML module (Qt 5).

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Qt) — https://codereview.qt-project.org/c/qt/qt5compat/+/771290
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Qt) — https://codereview.qt-project.org/c/qt/qt5compat/+/774512
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Qt) — https://codereview.qt-project.org/c/qt/qt5compat/+/774513
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Qt) — https://codereview.qt-project.org/c/qt/qt5compat/+/774632
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Qt) — https://codereview.qt-project.org/c/qt/qt5compat/+/760219
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: Qt) — https://codereview.qt-project.org/c/qt/qt5compat/+/760220

## Affected products and versions

- qt / qt: ≥ 0; < 5.0.0 (unknown, python); ≥ 5.0.0; < 6.8.10 (affected, python); ≥ 6.9.0; < 6.11.3 (affected, python). Source: CNA: Qt

## Severity and prioritization

- CVSS 4.0: 4.3 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/R:U/U:Green; source: CNA: Qt

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-674

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.qt.io/security-advisories?search=CVE-2026-97845 (CNA: Qt; vendor-advisory)

- https://codereview.qt-project.org/c/qt/qt5compat/+/771290 (CNA: Qt; patch)

- https://codereview.qt-project.org/c/qt/qt5compat/+/774512 (CNA: Qt; patch)

- https://codereview.qt-project.org/c/qt/qt5compat/+/774513 (CNA: Qt; patch)

- https://codereview.qt-project.org/c/qt/qt5compat/+/774632 (CNA: Qt; patch)

- https://codereview.qt-project.org/c/qt/qt5compat/+/760219 (CNA: Qt; patch)

- https://codereview.qt-project.org/c/qt/qt5compat/+/760220 (CNA: Qt; patch)

## Provenance

- CNA: Qt: https://www.cve.org/CVERecord?id=CVE-2026-97845; retrieved 2026-11-12; source updated 2026-11-12

Revision: 5207af3557b92903c9950fee08e4e87eaca57199ba6c1a47b497137a2aba7cef

Canonical: https://y2.dev/cve/CVE-2026-97845

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