PT-2026-29103 · Nginx-Ui · Nginx-Ui

Dapickle · Published 2026-03-17 · Updated 2026-04-07 · CVE-2026-33026

Positive Technologies (AI Summary)

CVSS v4.0

9.4

Critical

Base vector

AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Name of the Vulnerable Software and Affected Versions Nginx UI versions prior to 2.3.4

Description Nginx UI, a web user interface for the Nginx web server, contains a flaw in its backup restore mechanism. Prior to version 2.3.4, attackers can manipulate encrypted backup archives and inject malicious configuration during the restoration process. The backup format lacks a trusted integrity root, relying on encryption keys provided to the client for both encryption and integrity verification. This creates a circular trust model where attackers can decrypt, modify, re-hash, and re-encrypt backups, effectively bypassing integrity checks. Successful exploitation could lead to persistent configuration tampering, backdoor insertion, and potentially arbitrary command execution on the host system. The issue stems from a cryptographic design weakness that remained exploitable even after a previous fix addressing unauthorized access to backup files. The vulnerability is related to the following files: backup crypto.go, backup.go, restore.go, and SystemRestoreContent.vue.

Recommendations Update Nginx UI to version 2.3.4 or later.

Exploit

Fix

Improper Verification of Cryptographic Signature

Cleartext Storage of Sensitive Information

Weakness Enumeration

CWE-347

CWE-312

CWE-354

Related Identifiers

BDU:2026-06993

CVE-2026-33026

GHSA-FHH2-GG7W-GWPQ

GO-2026-4903

SUSE-SU-2026:1205-1

Affected Products

Nginx-Ui

References · 54

• 🔥 https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-fhh2-gg7w-gwpq · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33026.json · Exploit
• https://osv.dev/vulnerability/GO-2026-4903 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-33026 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1205-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33026 · Security Note
• https://osv.dev/vulnerability/GHSA-fhh2-gg7w-gwpq · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-06993 · Security Note
• https://github.com/0xJacky/nginx-ui · Note
• https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4 · Note
• https://suse.com/security/cve/CVE-2026-26061 · Note
• https://suse.com/security/cve/CVE-2026-33032 · Note
• https://suse.com/security/cve/CVE-2026-34389 · Note
• https://twitter.com/infoflowcloud/status/2038918331000885422 · Twitter Post
• https://suse.com/security/cve/CVE-2026-33907 · Note