---
title: "CVE-2026-33026: nginx-ui Backup Restore Allows Tampering with Encrypted Backups"
url: https://erroneo.us/security/cve/CVE-2026-33026/
description: "CVE-2026-33026 (github.com/0xJacky/Nginx-UI (Go)): Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui backup…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-30
date_modified: 2026-07-06
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-33026"
kev: false
cvss: 9.4
epss: 0.00211
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.2% , percentile 11: FIRST’s model estimates a 0.2% chance of exploitation activity in the next 30 days, higher than 11% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (high (admin)). Exposure depends on who can log in.
- Only applies if your dependency tree includes github.com/0xJacky/Nginx-UI (Go) < 1.9.10-0.20260315015203-f61bcec547c0, fixed in 1.9.10-0.20260315015203-f61bcec547c0 . Check your lockfile, including transitive dependencies.

## What it is

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 packages

- Go `github.com/0xJacky/Nginx-UI` < 1.9.10-0.20260315015203-f61bcec547c0 → fixed: 1.9.10-0.20260315015203-f61bcec547c0

## Affected products (CVE record)

- 0xJacky nginx-ui: < 2.3.4

## Severity

- GitHub_M CVSS 4.0: 9.4 `CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`
- GitHub CVSS 4.0: 9.4 `CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.21% probability of exploitation activity in the next 30 days; percentile 11.

## Sources

- [GitHub Advisory GHSA-fhh2-gg7w-gwpq](https://github.com/advisories/GHSA-fhh2-gg7w-gwpq)
- [CVE.org record CVE-2026-33026](https://www.cve.org/CVERecord?id=CVE-2026-33026)
- [NVD entry CVE-2026-33026](https://nvd.nist.gov/vuln/detail/CVE-2026-33026)
- [github.com](https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-fhh2-gg7w-gwpq)
- [github.com](https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4)
- [github.com](https://github.com/advisories/GHSA-g9w5-qffc-6762)
- [github.com](https://github.com/0xJacky/nginx-ui/commit/f61bcec547c0f305e35348d6440ef156c1d5c3cb)
- [pkg.go.dev](https://pkg.go.dev/vuln/GO-2026-4903)

---
Source page: https://erroneo.us/security/cve/CVE-2026-33026/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt