TI-2026-03933 Aliases CVE-2026-4528 GHSA-29mf-95fh-hwxf

trueleaf ApiFlow URL Validation http_proxy.service.ts validateUrlSecurity server-side request forgery

MEDIUM 64CWE-918Published 2026-03-21 · Updated 2026-03-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00312 24th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
trueleaf	ApiFlow	0.9.7	—	No fix listed	CNA

ApiFlow Vendortrueleaf Affected 0.9.7 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-4528
2026-10-03 Alias added: GHSA-29mf-95fh-hwxf

References

Exploit 1

https://www.notion.so/Server-Side-Request-Forgery-SSRF-in-ApiFlow-329ea92a3c4180489df2fa2702078fe5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences