CVE-2026-30118
Published: May 19, 2026· Updated: May 20, 2026
Official 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.
Risk Analysis
This critical Server-Side Request Forgery (SSRF) vulnerability in scalar/astro v0.1.13 allows unauthenticated attackers to force the backend server to send HTTP requests to attacker-controlled URLs. With a CVSS score of 9.8, this flaw can lead to exposure of authentication cookies and headers, and potential privilege escalation.
No public exploit is currently known for this vulnerability. It is remotely exploitable with low attack complexity, making it a serious threat.
Upgrade scalar/astro to a patched version that addresses this SSRF vulnerability. Implement strict validation and sanitization of URLs in proxy endpoints.
Technical Analysis
CVE-2026-30118 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-30118 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts