Vulnerability · Published Nov 4, 2026 · Assigned by Qt
CVE-2026-107479Integer truncation vulnerability in QTextCodec conversion functions impacts Qt Framework
Low 1.7
In plain English
A low-severity security flaw in Qt from qt. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).
Severity (CVSS 4.0)1.7Low
Exploit odds (30 days)0.2%top 94.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An integer truncation vulnerability in the QTextCodec conversion functions of the Qt 5 Core Compatibility APIs module impacts the Qt Framework. An application using the affected functionality could crash.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | qt6-5compat | no fix listed | UBUNTU-CVE-2026-107479 |
| Ubuntu:24.04:LTS | qt6-5compat | no fix listed | UBUNTU-CVE-2026-107479 |
| Ubuntu:26.04:LTS | qt6-5compat | no fix listed | UBUNTU-CVE-2026-107479 |
| Ubuntu:26.10 | qt6-5compat | no fix listed | UBUNTU-CVE-2026-107479 |
| Ubuntu:26.04:LTS | qtbase-opensource-src | no fix listed | UBUNTU-CVE-2026-107479 |
| Ubuntu:26.10 | qtbase-opensource-src | no fix listed | UBUNTU-CVE-2026-107479 |
Affected products (as reported)
Weakness: CWE-197 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/RE:L/U:Green