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Code InjectionWeakness · CWE-94

CVE-2026-30117

CRITICAL · 9.8 CVSS v3.1 Published 2026-05-19
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

scalar/astro v0.1.13 has an arbitrary file upload vulnerability in the Scalar Proxy endpoint's scalar_url query parameter. Attackers can upload crafted SVG files that contain malicious scripts or code, leading to arbitrary code execution on the server.

MitigationImplement strict file type validation and content sanitization for uploads, restrict allowed file extensions/types, and serve uploaded files from a non-executable location or disable script execution in the upload directory.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if scalar/astro is installed
    Check your project's dependencies (e.g., package.json, requirements.txt, Gemfile, or equivalent) for the scalar/astro package
    Affected if The scalar/astro package is present in your dependencies
  2. Verify the installed version of scalar/astro
    Run a package manager command to inspect the installed version (e.g., npm list scalar/astro, pip show scalar-astro, or equivalent for your package manager)
    Affected if The installed version is v0.1.13
  3. Determine if the Scalar Proxy endpoint is enabled
    Review your application configuration files and runtime settings to check if the Scalar Proxy feature is enabled
    Affected if The Scalar Proxy endpoint is enabled and accessible
  4. Check if the scalar_url query parameter is exposed
    Inspect your web server or application routing configuration to verify whether the Scalar Proxy endpoint accepts the scalar_url query parameter from external requests
    Affected if The scalar_url parameter is exposed and accepts user input without strict validation

You are affected if scalar/astro v0.1.13 is installed and the Scalar Proxy endpoint with its scalar_url query parameter is enabled and accessible to untrusted users.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict file type validation and content sanitization for uploads, restrict allowed file extensions/types, and serve uploaded files from a non-executable location or disable script execution in the upload directory.

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,930
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-30117 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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