CVE-2026-101201

QBinaryJson::fromBinaryData() integer overflow leading to OOB read

4.3MediumCVSS base score
0.16%Exploitation in 30 daysEPSS · top 94% of all CVEs
NoKnown exploitednot in CISA's KEV catalog
NonePublic exploitsnone known yet

Description

A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of out-of-bounds read.

Timeline

2026
28 Sept 2026
28 Sept 2026
ID reserved
By Qt
20 Oct 202622 days later
20 Oct 2026· 22 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

CVSS scores of CVE-2026-101201, by who scored it
Scored by	CVSS	Score	Vector
QtCNA (assigner)	4.0	Medium4.3	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/RE:L/U:Amber
NVDNVD · Awaiting Analysis	4.0	Medium4.3	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/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:L/U:Amber

EPSS (exploitation in 30 days): 0.16% · top 94% of all CVEs (10 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Affected products

qt · qt
- affected 5.0.0 – ≤ 6.8.8
- affected 6.9.0 – ≤ 6.11.2

References

Qt Wiki: List of known vulnerabilities in Qt products (opens in a new tab)vendor-advisory
dev patch 1 (opens in a new tab)patch
dev patch 2 (opens in a new tab)patch

Sources

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

Badge for a README or a ticket

[![CVE-2026-101201](https://cveledger.app/badge/CVE-2026-101201.svg)](https://cveledger.app/cve/CVE-2026-101201)

Record last updated 20 Oct 2026, 15:56 UTC.