How severe is CVE-2026-30117?

CVE-2026-30117 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-2026-30117 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-30117?

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-2026-30117 have an EU (EUVD) identifier?

Yes. CVE-2026-30117 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30944.

When was CVE-2026-30117 published?

CVE-2026-30117 was published on 2026-05-19 and last updated on 2026-06-17.

CVE-2026-30117

CVE-2026-30117 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30944
Weakness: CWE-94
Published: 2026-05-19
Last modified: 2026-06-17

Description

scalar/astro v0.1.13 was discovered to contain an arbitrary file upload vulnerability in the the scalar_url query parameter of the Scalar Proxy endpoint. This vulnerability allows attackers to execute arbitrary code via uploading a crafted SVG file.

Frequently asked questions

What is CVE-2026-30117?: scalar/astro v0.1.13 was discovered to contain an arbitrary file upload vulnerability in the the scalar_url query parameter of the Scalar Proxy endpoint. This vulnerability allows attackers to execute arbitrary code via uploading a crafted SVG file.
How severe is CVE-2026-30117?: CVE-2026-30117 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-2026-30117 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-30117?: 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-2026-30117 have an EU (EUVD) identifier?: Yes. CVE-2026-30117 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30944.
When was CVE-2026-30117 published?: CVE-2026-30117 was published on 2026-05-19 and last updated on 2026-06-17.

References

https://github.com/prassan10/XSS-Open-Redirect-via-scalar_url

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