What is CVE-2026-33407?

CVE-2026-33407 is a critical-severity vulnerability in Ellite Wallos, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2026-03-24.

How severe is CVE-2026-33407?

Critical severity. CVSS v3 base score is 9.1 out of 10.

SSRF in Ellite Wallos

CVE-2026-33407

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-03-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.002

Affected products

Ellite Wallos — versions < 4.7.0
Wallosapp Wallos

Weakness classification (CWE)

References

github.com/ellite/Wallos/security/advisories/GHSA-hhjq-82f8-m6rc (Exploit, Vendor Advisory)
github.com/ellite/Wallos/commit/e87387f0ebb540cd33e6dfda7181db9db650ecef (Patch)

Frequently asked questions

What is CVE-2026-33407?: CVE-2026-33407 is a critical-severity vulnerability in Ellite Wallos, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2026-03-24.
How severe is CVE-2026-33407?: Critical severity. CVSS v3 base score is 9.1 out of 10.