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: 0.003 (20.3th 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
Wallosapp Wallos

Weakness classification (CWE)

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

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, 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.