Vulnerability · Published Apr 28, 2026 · Assigned by mitre
CVE-2026-41526
Medium 6.5
In plain English
A medium-severity security flaw in KCoreAddons from KDE. 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). Fixed versions are available - upgrade the affected package.
Official description
In KDE KCoreAddons before 6.25, KShell::quoteArgs is intended to safely quote arguments so that they can be passed to a shell command. This parsing does not adequately handle metacharacters, leading to an escape from the shell. All applications relying on this method in a security-critical path to handle user input are affected and could be exploited. In particular, because sendInput() sends a string to a terminal, a control character such as \x01 can be used during injection.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | kcoreaddons | no fix listed | DEBIAN-CVE-2026-41526 |
| Debian:13 | kcoreaddons | no fix listed | DEBIAN-CVE-2026-41526 |
| Debian:14 | kcoreaddons | 5.116.0-2 | DEBIAN-CVE-2026-41526 |
| Debian:13 | kf6-kcoreaddons | no fix listed | DEBIAN-CVE-2026-41526 |
| Debian:14 | kf6-kcoreaddons | 6.26.0-1 | DEBIAN-CVE-2026-41526 |
| Ubuntu:22.04:LTS | kcoreaddons | no fix listed | UBUNTU-CVE-2026-41526 |
| Ubuntu:24.04:LTS | kcoreaddons | no fix listed | UBUNTU-CVE-2026-41526 |
| Ubuntu:25.10 | kcoreaddons | no fix listed | UBUNTU-CVE-2026-41526 |
| Ubuntu:26.04:LTS | kcoreaddons | no fix listed | UBUNTU-CVE-2026-41526 |
| Ubuntu:26.10 | kcoreaddons | no fix listed | UBUNTU-CVE-2026-41526 |
| Ubuntu:25.10 | kf6-kcoreaddons | no fix listed | UBUNTU-CVE-2026-41526 |
| Ubuntu:26.04:LTS | kf6-kcoreaddons | 6.24.0-0ubuntu1.1 | UBUNTU-CVE-2026-41526 |
| Ubuntu:26.04:LTS | kf6-kcoreaddons | 6.24.0-0ubuntu1.1 | USN-8857-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| KDE | KCoreAddons | 0 – before 6.25 |
Weakness: CWE-150 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
References
- https://invent.kde.org/frameworks/kcoreaddons/
- https://github.com/KDE/kcoreaddons/blob/50d360736c399502fedf203e95482b0d0e5a3ea2/src/lib/util/kshell.h#L43-L49
- https://github.com/KDE/kcoreaddons/blob/50d360736c399502fedf203e95482b0d0e5a3ea2/src/lib/util/kshell.h#L168
- https://github.com/KDE/kcoreaddons/releases/tag/v6.25.0
- https://kde.org/info/security/advisory-20260427-1.txt