Vulnerability in Tobychui Zoraxy
CVE-2026-100390
Zoraxy versions 3.2.3 through 3.3.4 fail to properly parse IPv6 addresses in the RemoteAddr field when setting forwarded headers. Unauthenticated attackers connecting over IPv6 can supply arbitrary X-Forwarded-For values to spoof their source IP and bypass authorization provider IP-based access controls.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- Pull Request #1264 (issue-tracking, patch)
- Patch Commit (patch)
- github.com/tobychui/zoraxy/blob/v3.3.4/src/mod/auth/sso/forward/util.go (technical-description)
- github.com/tobychui/zoraxy (product)
- VulnCheck Advisory: Zoraxy 3.2.3 through 3.3.4 Client IP Spoofing via X-Forwarded-For IPv6 (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100390?
- CVE-2026-100390 is a high-severity vulnerability in Tobychui Zoraxy, classified under Authentication Bypass by Spoofing. CVSS score: 7.4/10. Published 2026-09-25.
- How severe is CVE-2026-100390?
- High severity. CVSS v3 base score is 7.4 out of 10.