CVE-2026-41688CWE-918

Incomplete fix for CVE-2026-33399: SSRF in Wallos

High · published May 7, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
31.3
In the wild
Unconfirmed
What it is

Wallos is an open-source, self-hostable personal subscription tracker. In versions 4.8.4 and prior, the incomplete SSRF fix in Wallos validates webhook URLs via gethostbyname() but passes the original hostname to cURL without CURLOPT_RESOLVE pinning on 10 of 11 outbound HTTP endpoints, leaving a DNS rebinding TOCTOU window. At time of publication, there are no publicly available patches.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00385 · 31.3th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-05-07T13:52Z
EPSS history
Timeline
  • 07 MAY 13:52Z
    Incomplete fix for CVE-2026-33399: SSRF in Wallos
    cvelistv5