VULNpocalypse

CVE-2026-27944

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.

What it is

The CVE record is reserved but not yet published on CVE.org, so affected versions, CVSS and references will appear here once it is.

How it can be exploited

Public exploit evidence (Exploit Observer)

Exploit Observer evidence for this CVE has not been fetched yet.

Live scores

EPSS
0.228
likely to be attacked soon
VEDAS
0.981
strong exploit evidence
On CISA KEV
Not listed
Detection rule
Nuclei · Suricata

Who is affected

The CVE record does not list affected products yet.

How to fix it

No fixed version or vendor advisory is listed in the CVE record yet. Watch the vendor’s security page.

How to detect it

Nuclei template (active check)

Nginxui - Missing Authentication

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header.

Name and description quoted from the template, written by VEDAS.

The template sends 1 request (GET /api/backup); it decides using regex, status, word matchers. Severity in the template: critical. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash
nuclei -u https://your-host -t CVE-2026-27944.yaml
Show the template (51 lines)
yaml
id: CVE-2026-27944

info:
  name: "Nginxui - Missing Authentication"
  author: vedas-arpsyndicate
  severity: critical
  description: |
    Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is
    accessible without authentication and discloses the encryption keys required to decrypt the backup in the
    X-Backup-Security response header.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-27944&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=nginxui&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2026-27944
    cwe-id: CWE-306
  metadata:
    verified: false
  tags: cve,cve2026,nginx-ui,unauth,exposure,vkev,nginxui
http:
  - method: GET
    path:
      - "{{BaseURL}}/api/backup"

    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - "X-Backup-Security"
          - "application/zip"
        condition: and

      - type: word
        part: header
        words:
          - "attachment; filename="

      - type: status
        status:
          - 200

    extractors:
      - type: regex
        part: header
        group: 1
        name: backup_security_header
        regex:
          - "X-Backup-Security: (.+)"

CVE-2026-27944.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-27944 Nginxui - Missing Authentication. Add them to your Suricata rule set and reload.

Show the rules
suricata
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-27944 Nginxui - Missing Authentication"; flow:established,to_server; http.uri; content:"/api/backup"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2026-27944; reference:url,https://www.exploit.observer/?keyword=CVE-2026-27944&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=nginxui&match=exact; sid:1010416; rev:1;)

CVE-2026-27944.rules on GitHub

Advisories on this CVE

References

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: cve-scores (EPSS and VEDAS), vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.