CVE-2026-30839: Wallos: SSRF via webhook test endpoint

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-07 · updated 2026-06-17
Weakness: CWE-918

Description

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.6.2, testwebhooknotifications.php does not validate the target URL against private/reserved IP ranges, enabling full-read SSRF. The server response is returned to the caller. This issue has been patched in version 4.6.2.

Affected products

ellite Wallos: before 4.6.2 — fixed in 4.6.2

How to fix

Upgrade to a fixed version: ellite Wallos 4.6.2. Check the vendor advisory for mitigations.

References

https://github.com/ellite/Wallos/commit/e8a513591dbbf885966e2ef55c38622785b9060d
https://github.com/ellite/Wallos/releases/tag/v4.6.2
https://github.com/ellite/Wallos/security/advisories/GHSA-x4qp-xm2c-vqg9

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