CVE-2026-48700
CVE-2026-48700 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-913.
Key facts
- Severity: Critical (CVSS 4.0 base score 9.3)
- EPSS exploit prediction: 0% (8th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-31487
- Weakness: CWE-913
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-48700?
- 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.
- How severe is CVE-2026-48700?
- CVE-2026-48700 has a CVSS 4.0 base score of 9.3, rated critical severity.
- Is CVE-2026-48700 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-48700?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-48700 have an EU (EUVD) identifier?
- Yes. CVE-2026-48700 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31487.
- When was CVE-2026-48700 published?
- CVE-2026-48700 was published on 2026-05-22 and last updated on 2026-06-17.
References
- https://github.com/lxqt/pcmanfm-qt/releases
- https://www.openwall.com/lists/oss-security/2026/05/19/1
- https://www.openwall.com/lists/oss-security/2026/05/20/2
- http://www.openwall.com/lists/oss-security/2026/05/24/6
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