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CVE-2026-78253

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

Low2.3EPSS 0.43%
Published
Updated
Reserved
Assigned by
Qt

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.

Scores

CVSS scores of CVE-2026-78253, by who scored it
Scored byCVSSScoreVector
QtCNA (assigner)4.0Low2.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:N/R:U/RE:L/U:Green
NVDNVD · Awaiting Analysis4.0Low2.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:N/R:U/V:X/RE:L/U:Green
EPSS (exploitation in 30 days)
0.43% · top 63% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 2.3.

Weakness

Affected products

  • qt · qt

    • affected 5.0.0 – ≤ 6.8.8
    • affected 6.9.0 – ≤ 6.11.1

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .