Vulnerability · Published May 22, 2026 · Assigned by mitre
CVE-2026-48700
Critical 9.3
In plain English
A critical-severity security flaw in PCManFM-Qt from LXQt. 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 8% of all known vulnerabilities).
Official description
An issue was discovered in all versions of PCManFM-Qt starting from 1.1.0. When a regular file's path is passed as a URI in an org.freedesktop.FileManager1.ShowFolders D-Bus method call, PCManFM-Qt delegates to a different program (based on the file type) without user confirmation. This could be used to achieve code execution or circumvent network namespace restrictions. NOTE: those outcomes are potentially unwanted by most users; however, the behavior of the product does comply with the applicable specification, and a simplistic solution (ensuring that the URI does not name a regular file) may have adverse consequences for I/O.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | pcmanfm-qt | no fix listed | DEBIAN-CVE-2026-48700 |
| Debian:13 | pcmanfm-qt | no fix listed | DEBIAN-CVE-2026-48700 |
| Debian:14 | pcmanfm-qt | no fix listed | DEBIAN-CVE-2026-48700 |
| Ubuntu:22.04:LTS | pcmanfm-qt | no fix listed | UBUNTU-CVE-2026-48700 |
| Ubuntu:24.04:LTS | pcmanfm-qt | no fix listed | UBUNTU-CVE-2026-48700 |
| Ubuntu:25.10 | pcmanfm-qt | no fix listed | UBUNTU-CVE-2026-48700 |
| Ubuntu:26.04:LTS | pcmanfm-qt | no fix listed | UBUNTU-CVE-2026-48700 |
| Ubuntu:26.10 | pcmanfm-qt | no fix listed | UBUNTU-CVE-2026-48700 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| LXQt | PCManFM-Qt | 1.1.0 – through 2.4.0 |
Weakness: CWE-913 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/AU:N/R:I/V:D/RE:M/U:Clear