CVE-2026-33026: nginx-ui Backup Restore Allows Tampering with Encrypted Backups
Vulnerability summary
CVE-2026-33026 is a critical (CVSS 9.4) vulnerability in 0xjacky nginx-ui. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 26.7% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (GitHub, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2 · Related 2Timeline
- 30-03-2026PublishedVulnerability first disclosed.
- 31-03-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · GoEcosystem advisory · calculated9.4CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- NVDNIST9.4CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS trend
Probability
0.33%
Chance of exploitation in the next 30 days
Percentile
27%
Versus all other CVEs
30-day change
Increase +0.12 pp
From 0.21% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundNginx Ui
Maturity: poc
Weaknesses
CWE · root cause- CWE-312Cleartext Storage of Sensitive InformationThe product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.
- CWE-347Improper Verification of Cryptographic SignatureThe product does not verify, or incorrectly verifies, the cryptographic signature for data.
- CWE-354Improper Validation of Integrity Check ValueThe product does not validate or incorrectly validates the integrity check values or "checksums" of a message.
Affected systems
Known conditions: network-reachable, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
0xjacky1 product
- nginx-ui< 2.3.4
Github.com/0xJacky1 product
- Nginx-UI< 1.9.10-0.20260315015203-f61bcec547c0 | All versions (No fix recorded)
Nginxui1 product
- nginx_ui< 2.3.4
3 vendors · 3 products
References
7 links- github.com/0xJacky/nginx-ui/security/advisories/GHSA-fhh2-gg7w-gwpqX Refsource CONFIRMWEBAdvisoryExploitMitigationVendor Advisory
- github.com/0xJacky/nginx-uiPACKAGE