CVE-2026-33026: nginx-ui Backup Restore Allows Tampering with Encrypted Backups

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-03-30 · updated 2026-06-17
Weakness: CWE-312

Description

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui backup restore mechanism allows attackers to tamper with encrypted backup archives and inject malicious configuration during restoration. This issue has been patched in version 2.3.4.

Affected products

0xJacky nginx-ui: before 2.3.4 — fixed in 2.3.4

How to fix

Upgrade to a fixed version: 0xJacky nginx-ui 2.3.4. Check the vendor advisory for mitigations.

References

https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4
https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-fhh2-gg7w-gwpq
https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-fhh2-gg7w-gwpq

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