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Vulnerability record · CVE-2026-30118 · published 19 May 2026

CVE-2026-30118: Server-side request forgery (SSRF) vulnerability

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.

9.8 CVSS 3.1 Critical EPSS 0.63% · top 52.1% CWE-918 · Server-side request forgery (SSRF) Deferred
9.8CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
24 Jul 2026Last modified by NVD

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.

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

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-30118), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.