Nginx UI: Incomplete fix of CVE-2026-84315 - the api/cluster router was not - wrapped in RequireSecureSession, so those sensitive mutations run without OTP step-up

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, the api/cluster router exposes node and namespace mutation operations and cluster-wide Nginx reload or restart operations with AuthRequired but without RequireSecureSession. An authenticated OTP-enabled user possessing a stolen or persisted JWT can therefore perform node CRUD, read or replace node credentials, change namespaces, and invoke nodes/reload_nginx or nodes/restart_nginx without a fresh second-factor step-up. This issue is an incomplete fix for CVE-2026-84315 and is fixed in version 2.5.0.

Source published

9 Oct 2026 15:47:33 UTC

Source modified

9 Oct 2026 17:16:22 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, the api/cluster router exposes node and namespace mutation operations and cluster-wide Nginx reload or restart operations with AuthRequired but without RequireSecureSession. An authenticated OTP-enabled user possessing a stolen or persisted JWT can therefore perform node CRUD, read or replace node credentials, change namespaces, and invoke nodes/reload_nginx or nodes/restart_nginx without a fresh second-factor step-up. This issue is an incomplete fix for CVE-2026-84315 and is fixed in version 2.5.0.

Source published

Oct 9, 2026, 3:47:33 PM (timezone not stated)

Source modified

Oct 9, 2026, 5:16:22 PM (timezone not stated)

Observed here

7 Nov 2026 04:31:40 UTC

Source terms

ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 3.1 · 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, the api/cluster router exposes node and namespace mutation operations and cluster-wide Nginx reload or restart operations with AuthRequired but without RequireSecureSession. An authenticated OTP-enabled user possessing a stolen or persisted JWT can therefore perform node CRUD, read or replace node credentials, change namespaces, and invoke nodes/reload_nginx or nodes/restart_nginx without a fresh second-factor step-up. This issue is an incomplete fix for CVE-2026-84315 and is fixed in version 2.5.0.

Source published

9 Oct 2026 16:17:26 UTC

Source modified

20 Oct 2026 14:32:08 UTC

Observed here

25 Oct 2026 05:17:13 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Secondary · 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

## Summary Incomplete fix of GHSA-5v7c-xpfp-p65m: the secure-session (OTP step-up) requirement added to the nginx, cert, dns, backup, site, and stream mutation routers was not applied to the parallel api/cluster router, so cluster node management and cluster-wide nginx reload/restart run with only a JWT and no step-up. An authenticated user whose JWT is stolen or persisted, but who does not hold a fresh secure-session, can perform cluster node CRUD (including reading and rewriting a node token secret) and trigger cluster-wide nginx reload/restart. Confirmed at HEAD 2cb7ee9102c9d87274de2fa104db804841d140a0. ## The defect GHSA-5v7c-xpfp-p65m required a fresh secure session (an OTP step-up beyond the JWT) for sensitive mutation routes. The fix wrapped the nginx, cert, dns, backup, site, and stream mutation handlers in middleware.RequireSecureSession() and added reload/restart to the MCP sensitive-tool list. It did not touch the physically separate api/cluster package, whose router registers the same class of sensitive operations on the bare authenticated group. The fixed sibling, api/nginx/router.go: ```go o := r.Group("", middleware.RequireSecureSession()) // line 28 { o.POST("nginx/reload", Reload) // line 30 o.POST("nginx/restart", Restart) // line 31 } ``` The missed router, api/cluster/router.go, registers every sensitive operation directly on r with no RequireSecureSession wrapper: ```go nodeGroup := r.Group("nodes") // line 9, no step-up { nodeGroup.POST("", AddNode) // line 12 nodeGroup.POST("/:id", EditNode) // line 13 nodeGroup.DELETE("/:id", DeleteNode) // line 14 } r.POST("nodes/reload_nginx", ReloadNginx) // line 17 r.POST("nodes/restart_nginx", RestartNginx) // line 18 r.POST("namespaces", AddNamespace) // line 22 r.POST("namespaces/:id", ModifyNamespace) // line 23 r.DELETE("namespaces/:id", DeleteNamespace) // line 24 ``` Both routers mount on the same group in router/routers.go: `g := root.Group("/", middleware.AuthRequired(), middleware.Proxy())` (line 87); nginx.InitRouter(g) creates its own RequireSecureSession subgroup, cluster.InitRouter(g) does not. So the cluster routes inherit only AuthRequired and Proxy, exactly the pre-fix posture the advisory closed for the nginx routes. AuthRequired has no role gate, so any authenticated user reaches them. ## Attacker model and impact An authenticated, OTP-enabled user who does not present a fresh X-Secure-Session-ID (the parent advisory's model: a stolen or persisted JWT used without the step-up). Such a user can: add/edit/delete cluster nodes (AddNode/EditNode store an AES-serialized node token, the secret used to control a remote node, so this reads back and rewrites a cross-node credential); trigger nodes/reload_nginx and nodes/restart_nginx across the cluster (the exact reload/restart action class the fix protected on the single-node path); and add/modify/delete/reorder namespaces. Proof of concept: with a valid JWT but no fresh secure session, call POST /api/nodes (AddNode) or POST /api/nodes/reload_nginx. The nginx equivalent POST /api/nginx/reload returns the secure-session challenge; the cluster route succeeds. ## Verification Source-verified at HEAD: the nginx router wraps reload/restart in RequireSecureSession, the cluster router registers node/namespace/reload/restart directly on the group with no such wrapper, and both mount on the AuthRequired+Proxy-only group. I did not stand up a live nginx-ui. ## Suggested fix Wrap the cluster router's mutation handlers (node CRUD, nodes/reload_nginx, nodes/restart_nginx, namespace CRUD) in middleware.RequireSecureSession(), mirroring api/nginx/router.go. Secondary lower-confidence items worth checking in the same pass: the system/restart handler, the core-upgrade websocket, and the upstream socket PUT also appear to run without the step-up (I did not fully trace these).

Source published

9 Oct 2026 17:08:06 UTC

Source modified

19 Oct 2026 21:40:57 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Publisher rating · HIGH

Nginx UI: Incomplete fix of CVE-2026-84315 - the api/cluster router was not - wrapped in RequireSecureSession, so those sensitive mutations run without OTP step-up in github.com/0xJacky/Nginx-UI

Source published

19 Oct 2026 21:08:26 UTC

Source modified

19 Oct 2026 21:31:39 UTC

Observed here

24 Oct 2026 13:19:41 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.