Is CVE-2026-27479 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-27479, but active exploitation has not been confirmed.

Can CVE-2026-27479 be exploited remotely?

Yes. CVE-2026-27479 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27479?

CVE-2026-27479 has a CVSS score of 7.7 (HIGH) and an EPSS exploitation probability of 0.03%.

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HIGHPOC

CVE-2026-27479

CWE-918Published: February 21, 2026· Updated: Feb 24, 2026

7.7

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:7.3th

Official Description

Wallos is an open-source, self-hostable personal subscription tracker. Versions 4.6.0 and below contain a Server-Side Request Forgery (SSRF) vulnerability in the subscription and payment logo/icon upload functionality. The application validates the IP address of the provided URL before making the request, but allows HTTP redirects (CURLOPT_FOLLOWLOCATION = true), enabling an attacker to bypass the IP validation and access internal resources, including cloud instance metadata endpoints. The getLogoFromUrl() function validates the URL by resolving the hostname and checking if the resulting IP is in a private or reserved range using FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE. However, the subsequent cURL request is configured with CURLOPT_FOLLOWLOCATION = true and CURLOPT_MAXREDIRS = 3, which means the request will follow HTTP redirects without re-validating the destination IP. This issue has been fixed in version 4.6.1.

NVD Source

Technical Analysis

CVE-2026-27479 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.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.7.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

A proof-of-concept (PoC) exploit exists for CVE-2026-27479. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.