What is CVE-2026-33399?

CVE-2026-33399 is a high-severity vulnerability in Ellite Wallos, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-03-24.

How severe is CVE-2026-33399?

High severity. CVSS v3 base score is 7.7 out of 10.

SSRF in Ellite Wallos

CVE-2026-33399

Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, the SSRF fix applied in version 4.6.2 for CVE-2026-30839 and CVE-2026-30840 is incomplete. The validate_webhook_url_for_ssrf() protection was ad…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (14.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

Affected products

Ellite Wallos — versions < 4.7.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

https://github.com/ellite/Wallos/security/advisories/GHSA-mfjc-3258-cq3j (x_refsource_CONFIRM)
https://github.com/ellite/Wallos/commit/e87387f0ebb540cd33e6dfda7181db9db650ecef#diff-d77202c5d47a3d7d4586e519f6f5e256da5fb2969fa8b9c75c399b2821e9de40 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-33399?: CVE-2026-33399 is a high-severity vulnerability in Ellite Wallos, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.7/10. Published 2026-03-24.
How severe is CVE-2026-33399?: High severity. CVSS v3 base score is 7.7 out of 10.