Vulnerability in Pecee Simple-Router
CVE-2026-103592
simple-php-router through 5.4.1.7 contains an IP restriction bypass vulnerability in the IpRestrictAccess middleware that allows remote unauthenticated attackers to bypass IP whitelist and blacklist protections. Attackers can spoof X-Forwarded-For, CF-Connecting-IP, or Client-IP headers to impersonate whitelisted addresses or evade blacklists, gaining access to IP-restricted routes.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
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
Weakness classification (CWE)
References
- github.com/skipperbent/simple-php-router (product)
- github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Middleware… (technical-description)
- github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Request.php (technical-description)
- github.com/skipperbent/simple-php-router/issues/727 (issue-tracking)
- www.vulncheck.com/advisories/simple-php-router-through-5.4.1.7-ip-restriction-b… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103592?
- CVE-2026-103592 is a medium-severity vulnerability in Pecee Simple-Router, classified under CWE-348. CVSS score: 6.5/10. Published 2026-09-30.
- How severe is CVE-2026-103592?
- Medium severity. CVSS v3 base score is 6.5 out of 10.