CVE-2026-33407CWE-918CWE-922

Wallos: SSRF via HTTP Proxy Environment Variable

High · published March 24, 2026

CVSS v4.0
8.3
EPSS
1%
Percentile
45.1
In the wild
Unconfirmed
What it is

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, Wallos endpoints/logos/search.php accepts HTTP_PROXY and HTTPS_PROXY environment variables without validation, enabling SSRF via proxy hijacking. The server performs DNS resolution on user-supplied search terms, which can be controlled by attackers to trigger outbound requests to arbitrary domains. This issue has been patched in version 4.7.0.

The record
Technical detail
CVSS v4.0
8.3 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00547 · 45.1th percentile
Weaknesses
CWE-918 · Server-Side Request Forgery (SSRF); CWE-922 · Insecure Storage of Sensitive Information
Published
2026-03-24T17:40Z
EPSS history
Timeline
  • 24 MAR 17:40Z
    Wallos: SSRF via HTTP Proxy Environment Variable
    cvelistv5