Is CVE-2026-41687 actively exploited?

No active exploitation of CVE-2026-41687 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-41687 be exploited remotely?

Yes. CVE-2026-41687 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-41687?

CVE-2026-41687 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-41687

CWE-918Published: May 7, 2026· Updated: May 7, 2026

4.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:7.1th

Official Description

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.8.1, the SSRF protection in endpoints/subscription/add.php (line 42) and endpoints/payments/add.php (line 40) uses an inline IP validation check (FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) that does not block CGNAT addresses (100.64.0.0/10, RFC 6598). The includes/ssrf_helper.php file explicitly defines is_cgnat_ip() to cover this gap (used by notification endpoints), but the logo/icon URL fetching in subscription and payment endpoints performs its own inline validation that misses this range. This allows authenticated users to perform Blind SSRF to internal services in Tailscale, Carrier-Grade NAT, and other environments using 100.64.0.0/10 addresses. This issue has been patched in version 4.8.1.

NVD Source

Technical Analysis

CVE-2026-41687 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.