Vulnerability in Yourls
CVE-2026-62858
YOURLS is a self-hosted, customizable URL shortener written in PHP. Prior to 1.10.5, yourls_get_request() extracted the request path without sanitization, after which yourls_sanitize_url() and yourls_esc_url() preserved dot and slash traversal sequences before an attacker-controlled keyword reached file_exists() and include() under YOURLS_PAGEDIR. An unauthenticated remote attacker could traverse outside the intended pages directory and include a local PHP file that was already present on the server, such as an uploaded or injected file, causing the file to execute in the YOURLS web process. This issue is fixed in version 1.10.5.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Yourls — versions < 1.10.5
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-62858?
- CVE-2026-62858 is a medium-severity vulnerability in Yourls, classified under PHP Remote File Inclusion. CVSS score: 5.3/10. Published 2026-10-14.
- How severe is CVE-2026-62858?
- Medium severity. CVSS v3 base score is 5.3 out of 10.