CVE-2026-107809 Nginx-UI AuthRequired token cookie fallback enables CSRF against management APIs
Attackers can trick administrators into modifying Nginx configurations via CSRF due to missing token validation on management APIs.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-107809?
CVE-2026-107809 is a high-severity vulnerability in 0xJacky nginx-ui, published on 9 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, AuthRequired accepts a browser-managed token cookie as an API credential after the front end stores the JWT in that cookie. Because management endpoints do not universally require a CSRF token or perform Origin or Referer validation, a remote attacker can induce a logged-in administrator's browser to submit authenticated cross-site state-changing requests, including POST /api/configs. The attack requires an administrator account without OTP/Passkey or a target endpoint that does not require secure-session proof. The attacker cannot read the cross-origin response but can modify Nginx configuration, trigger reloads, or invoke other management operations reachable with the victim's session. This issue is fixed in version 2.5.0.
Weakness: CWE-352
Which versions are affected by CVE-2026-107809?
3 open source packages ship an affected version, including github.com/0xJacky/Nginx-UI. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/0xJacky/Nginx-UI Go | From 1.9.10-0.20250517140552-daee3ac7ade1 | 1.9.10-0.20260728074433-a3999bd78a3b |
github.com/0xJacky/Nginx-UI Go | From 1.9.10-0.20250517140552-daee3ac7ade1 | 1.9.10-0.20260728074433-a3999bd78a3b |
github.com/0xJacky/Nginx-UI Go | From 1.9.10-0.20250517140552-daee3ac7ade1 | 1.9.10-0.20260728074433-a3999bd78a3b |
Products include Nginxui Nginx Ui.
How do I fix CVE-2026-107809?
Upgrade github.com/0xJacky/Nginx-UI to 1.9.10-0.20260728074433-a3999bd78a3b or later.
Is CVE-2026-107809 being exploited?
There is no known exploitation of CVE-2026-107809 in the wild and no public exploit code.
Other vulnerabilities in 0xJacky nginx-ui
- CVE-2026-33032 Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover
- CVE-2026-27944 Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure
- CVE-2024-23827 Nginx-UI arbitrary file write through the Import Certificate feature
- CVE-2026-107806 Nginx UI: Authenticated Remote Code Execution via Backup Restore App Config Overwrite
- CVE-2026-33026 nginx-ui Backup Restore Allows Tampering with Encrypted Backups
Sources
Also known as GHSA-33rr-wq23-g6gg, GO-2026-6703.