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CVE-2026-100140Integer overflow vulnerability in XML parsing functionality of Qt5Compat impacts Qt
- 1.9LowCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.
Timeline
ID reserved
By Qt
- 38 days later
· 38 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| QtCNA (assigner) | 4.0 | Low1.9 | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/R:U/U:Green |
| NVDNVD · Awaiting Analysis | 4.0 | Low1.9 | CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/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:X/AU:X/R:U/V:X/RE:X/U:Green |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (15 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 1.9.
Affected products
References
References5
- https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-100140: (opens in a new tab)vendor-advisory
- https://codereview.qt-project.org/c/qt/qt5compat/+/768900 (opens in a new tab)patch
- https://codereview.qt-project.org/c/qt/qt5compat/+/764751 (opens in a new tab)patch
- https://codereview.qt-project.org/c/qt/qt5compat/+/768901 (opens in a new tab)patch
- https://codereview.qt-project.org/c/qt/qt5compat/+/768902 (opens in a new tab)patch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-115135 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-100140)Record last updated .