CVE-2026-30118

CRITICAL

scalar/astro 0.1.13 - Server-Side Request Forgery via Scalar Proxy scalar_url Parameter

Title source: llm

Description

scalar/astro v0.1.13 was discovered to contain a Server-Side Request Forgery (SSRF) in the scalar_url query parameter of the Scalar Proxy endpoint. This vulnerability allows unauthenticated attackers to force the backend server to send HTTP requests to attacker-controlled URLs, leading to authentication cookies and headers exposure and possible privilege escalation.

References (1)

Core 1

Core References

https://github.com/prassan10/ssrf-zero-click-ato-scalar

View Writeup ZIP pw:eip

Scores

CVSS v3 9.8

EPSS 0.0047

EPSS Percentile 36.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-918

Status published

Published May 19, 2026

Tracked Since May 19, 2026