Denial-of-service (stack-exhaustion) vulnerability in QXmlStreamReader::readElementText() impacts Qt (CVE-2026-78253) | HOL Guard CVE

Low · CVSS 2.3CVE-2026-78253

Denial-of-service (stack-exhaustion) vulnerability in QXmlStreamReader::readElementText() impacts Qt

Answer in brief

CVE-2026-78253 records a Low severity (CVSS 2.3) vulnerability in Denial-of-service (stack-exhaustion) vulnerability in QXmlStreamReader::readElementText() impacts Qt. The current sources do not mark it as known exploited. The current feed maps qt/qt (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 23, 2026Updated Sep 23, 2026Source checked Sep 23, 2026First seen by HOL Sep 23, 2026Material review Sep 23, 2026

Upstream Advisory

Key facts

Risk: Low · CVSS 2.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 2.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps qt/qt (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
qt/qtgeneric	>=5.0.0 <=6.8.8 \|\| >=6.9.0 <=6.11.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for qt/qt.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 23, 2026

Sources and claim methodology

Source referencecodereview.qt-project.org

Upstream source description

Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.

Quoted source text, attributed separately from HOL analysis.