Vulnerability in Paicni Cfnext
CVE-2026-121450
CFNext before 3.1.0 contains a weak cryptographic derivation vulnerability that allows subscription link holders to recover the admin password because the subscription UUID is an MD5 of the password with a fixed public salt. Attackers can brute-force the password offline without rate limiting, log into the admin panel, and read stored Trojan, Clash, Telegram and Cloudflare API secrets.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/PAICNI/CFNext/issues/57 (issue-tracking)
- github.com/PAICNI/CFNext (product)
- github.com/PAICNI/CFNext/commit/ca8ad82bb7c635f765c82a1cd0c954fd70d81fb7 (patch)
- github.com/PAICNI/CFNext/blob/1c7b3d8bed5b06a1449ea28302bb9a648f67e8e1/CFNext-明… (technical-description)
- github.com/PAICNI/CFNext/blob/1c7b3d8bed5b06a1449ea28302bb9a648f67e8e1/CFNext-明… (technical-description)
- www.vulncheck.com/advisories/cfnext-before-3.1.0-admin-password-recovery-via-md… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-121450?
- CVE-2026-121450 is a high-severity vulnerability in Paicni Cfnext, classified under CWE-760. CVSS score: 7.5/10. Published 2026-11-03.
- How severe is CVE-2026-121450?
- High severity. CVSS v3 base score is 7.5 out of 10.