Vulnerability · Published Oct 27, 2026 · Assigned by Qt
CVE-2026-107472Out-of-bounds read vulnerability in QTextCodec TSCII encoding impacts Qt
Medium 4.3
In plain English
A medium-severity out-of-bounds read 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 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 4.0)4.3Medium
Exploit odds (30 days)0.1%top 98.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An out-of-bounds read vulnerability in the QTextCodec TSCII encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Applications that convert text to the TSCII encoding through QTextCodec may read memory outside the input buffer, which can cause the application to crash or misinterpret the data.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | qt6-5compat | no fix listed | DEBIAN-CVE-2026-107472 |
| Debian:13 | qt6-5compat | no fix listed | DEBIAN-CVE-2026-107472 |
| Debian:14 | qt6-5compat | no fix listed | DEBIAN-CVE-2026-107472 |
| Debian:12 | qtbase-opensource-src | no fix listed | DEBIAN-CVE-2026-107472 |
| Debian:13 | qtbase-opensource-src | no fix listed | DEBIAN-CVE-2026-107472 |
| Debian:14 | qtbase-opensource-src | no fix listed | DEBIAN-CVE-2026-107472 |
| Ubuntu:22.04:LTS | qt6-5compat | no fix listed | UBUNTU-CVE-2026-107472 |
| Ubuntu:24.04:LTS | qt6-5compat | no fix listed | UBUNTU-CVE-2026-107472 |
| Ubuntu:26.04:LTS | qt6-5compat | no fix listed | UBUNTU-CVE-2026-107472 |
| Ubuntu:26.10 | qt6-5compat | no fix listed | UBUNTU-CVE-2026-107472 |
Affected products (as reported)
Weakness: CWE-125 · Vector: 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:Green