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CVE-2026-84313

HIGH 8.8

Published 2026-10-12 · Last modified 2026-10-15

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, POST /api/otp_enroll and POST /api/finish_passkey_register are registered outside RequireSecureSession and accept a normal authenticated session without verifying the current password. An attacker with a stolen JWT can bind an attacker-controlled TOTP secret when the victim has not already enabled TOTP, or can register an attacker-controlled passkey because that path has no equivalent existing-enrollment guard. These changes create persistent account access that can survive a password change and interfere with the legitimate user's authentication. This issue is fixed in version 2.4.1.

ELEVATED IMPACT

Severe if exploited (CVSS 8.8), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 45th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

8.8CVSS 3.1 · HIGH

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors 0xjacky

Products Nginx Ui

Weakness (CWE)

  • CWE-287: : Improper Authentication
  • CWE-306: : Missing Authentication for Critical Function

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • Nginx-UI Go

    pkg:golang/Nginx-UI

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 1.9.10-0.20260703131214-23d1934099b0
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-gfrc-g87h-7h5w/GHSA-gfrc-g87h-7h5w.json"
  }
}
    GitHub Advisory Database · GHSA-gfrc-g87h-7h5w · Updated 2026-10-19T21:40:57.843249117Z
  • github.com/0xJacky/Nginx-UI Go

    pkg:golang/github.com/0xJacky/Nginx-UI

    SEMVER range
    • All earlier versions (introduced 0)
    Additional upstream package constraints
    {
  "ecosystem": {
    "custom_ranges": [
      {
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.9.10-0.20260703131214-23d1934099b0"
          }
        ],
        "type": "ECOSYSTEM"
      }
    ],
    "imports": [
      {
        "path": "github.com/0xJacky/Nginx-UI/api/nginx",
        "symbols": [
          "InitRouter"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/api/streams",
        "symbols": [
          "InitRouter"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/internal/backup",
        "symbols": [
          "ValidateAutoBackupConfig",
          "createCustomDirectoryBackup",
          "createEncryptedBackup"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/api/terminal",
        "symbols": [
          "InitRouter"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/mcp",
        "symbols": [
          "InitRouter"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/internal/middleware",
        "symbols": [
          "RequireSecureSession"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/api/sites",
        "symbols": [
          "InitRouter"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/api/certificate",
        "symbols": [
          "InitAcmeUserRouter",
          "InitCertificateRouter",
          "InitCertificateWebSocketRouter",
          "InitDNSCredentialRouter"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/internal/config",
        "symbols": [
          "ValidateConfigDirectives",
          "configuresRootWorkers",
          "firstDirectiveToken",
          "loadsRestrictedDynamicModule"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/mcp/config",
        "symbols": [
          "handleNginxConfigAdd"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/api/settings",
        "symbols": [
          "InitRouter"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/internal/user",
        "symbols": [
          "DeleteToken",
          "DeleteUserTokens",
          "GetTokenUserByShortToken"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/api/backup",
        "symbols": [
          "InitAutoBackupRouter",
          "InitRouter"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/api/user",
        "symbols": [
          "BeginPasskeyRegistration",
          "CasdoorCallback",
          "EnrollTOTP",
          "GetCasdoorUri",
          "InitManageUserRouter",
          "InitUserRouter",
          "UpdateCurrentUserPassword"
        ]
      },
      {
        "path": "github.com/0xJacky/Nginx-UI/api/dns",
        "symbols": [
          "InitRouter"
        ]
      }
    ]
  },
  "database": {
    "source": "https://vuln.go.dev/ID/GO-2026-6786.json"
  }
}
    Go Vulnerability Database · GO-2026-6786 · Updated 2026-10-19T21:31:50.624956898Z

All CVSS metrics

  • HIGH 8.8 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • HIGH 8.8 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Exploit-tagged references (not proof of a PoC)

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS