How severe is CVE-2026-30118?

CVE-2026-30118 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-30118 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-30118?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-30118 have an EU (EUVD) identifier?

Yes. CVE-2026-30118 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30948.

When was CVE-2026-30118 published?

CVE-2026-30118 was published on 2026-05-19 and last updated on 2026-06-17.

CVE-2026-30118

CVE-2026-30118 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30948
Weakness: CWE-918
Published: 2026-05-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-30118?: 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.
How severe is CVE-2026-30118?: CVE-2026-30118 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-30118 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-30118?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-30118 have an EU (EUVD) identifier?: Yes. CVE-2026-30118 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30948.
When was CVE-2026-30118 published?: CVE-2026-30118 was published on 2026-05-19 and last updated on 2026-06-17.

References

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

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