CVE-2026-103592
simple-php-router through 5.4.1.7 IP restriction bypass via forwarding headers
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 30, 2026
- Updated
- Oct 5, 2026
- Reserved
- Sep 30, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-348 Use of Less Trusted Source
Affected Products
| Product | Versions |
|---|---|
simple-routerpecee |
|
References
- GitHub Issue #727issue-tracking
- https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Middleware/IpRestrictAccess.phptechnical-description
- https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Request.phptechnical-description
- https://github.com/skipperbent/simple-php-routerproduct
- VulnCheck Advisory: simple-php-router through 5.4.1.7 IP restriction bypass via forwarding headersthird-party-advisory
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