Path Traversal in Flarum Framework
CVE-2026-41887
Flarum is open-source forum software. Prior to versions 1.8.16 and 2.0.0-rc.1, Flarum's patch for CVE-2023-27577 restricted the @import and data-uri() LESS features in the custom_less setting, but the same restriction was never applied to…
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.000 (2.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Flarum Framework — versions < 1.8.16, >= 2.0.0-beta.1, < 2.0.0-rc.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-41887?
- CVE-2026-41887 is a medium-severity vulnerability in Flarum Framework, classified under Path Traversal. CVSS score: 4.9/10. Published 2026-05-08.
- How severe is CVE-2026-41887?
- Medium severity. CVSS v3 base score is 4.9 out of 10.