EUVD-2026-18827
GHSA-43rw-xw76-9g92
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Tags
Description
prompts.chat prior to commit 30a8f04 contains a server-side request forgery vulnerability in Fal.ai media status polling that allows authenticated users to perform arbitrary outbound requests by supplying attacker-controlled URLs in the token parameter. Attackers can exploit the lack of URL validation to disclose the FAL_API_KEY in the Authorization header, enabling credential theft, internal network probing, and abuse of the victim's Fal.ai account.
Analysis
Server-side request forgery (SSRF) in prompts.chat allows authenticated users to force the server to make arbitrary HTTP requests with the application's FAL_API_KEY exposed in Authorization headers. Attackers can exploit unvalidated URL parameters in Fal.ai media status polling to exfiltrate API credentials, probe internal networks, and abuse the victim's Fal.ai account resources. …
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Remediation
Within 24 hours: Identify all instances of prompts.chat with Fal.ai integration in your environment and disable the media status polling feature. Within 7 days: Rotate all FAL_API_KEY credentials and apply the vendor-released patch to the latest patched version of prompts.chat. …
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External POC / Exploit Code
Leaving vuln.today