SSRF in Trueleaf Apiflow
CVE-2026-4528
A vulnerability was determined in trueleaf ApiFlow 0.9.7. The impacted element is the function validateUrlSecurity of the file packages/server/src/service/proxy/http_proxy.service.ts of the component URL Validation Handler. This manipulation causes server-side request forgery. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.005 (38.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Trueleaf Apiflow — versions 0.9.7
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- www.notion.so/Server-Side-Request-Forgery-SSRF-in-ApiFlow-329ea92a3c4180489df2f… (exploit)
Frequently asked questions
- What is CVE-2026-4528?
- CVE-2026-4528 is a high-severity vulnerability in Trueleaf Apiflow, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.3/10. Published 2026-03-21.
- How severe is CVE-2026-4528?
- High severity. CVSS v3 base score is 7.3 out of 10.