Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-104939— NGINX Ingress Controller vulnerability

Quick assessment

Affected
F5 NGINX Ingress Controller
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

描述 在实现外部认证（externalAuth）策略时，NGINX Ingress Controller 存在一处漏洞。由于该控制器在处理来自 OAuth 身份提供程序（IdP）的 HTTP 响应时可能存在不当处理行为，攻击者可能在正确的外部认证完成之前，获取对受保护路径的未认证访问权限。 影响 此漏洞可能使远程攻击者获得对受保护路径的未认证访问。需要注意的是，该漏洞仅影响数据平面（data plane），不涉及控制平面（control plane）。 注：已达到技术支持终止（End of Technical Su

CVSS 7.5 · High EPSS 0.36% · P28

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
F5 NGINX Ingress Controller 5.6.0< 5.7.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-104939

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
NGINX Ingress Controller vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress. NGINX Ingress Controller may mishandle the HTTP response from an OAuth IdP and allow an attacker to acquire unauthenticated access to protected paths before the proper external authentication can happen. Impact This vulnerability may allow remote attackers unauthenticated access to protected paths. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证算法的不正确实现
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
F5 NGINX Ingress Controller 5.6.0 ~ 5.7.0 -

II. Public POCs for CVE-2026-104939

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-104939

请登录查看更多情报信息。

Other References for CVE-2026-104939 (1)

Same Patch Batch · F5 · 2026-10-14 · 11 CVEs total

CVE-2026-91184 8.8 HIGH NGINX Gateway Fabric vulnerability
CVE-2026-93479 8.1 HIGH NGINX map directive and regex matching vulnerability
CVE-2026-15176 8.1 HIGH NGINX ngx_http_core_module vulnerability
CVE-2026-97205 8.1 HIGH NGINX ngx_http_core_module vulnerability
CVE-2026-94197 7.5 HIGH NGINX Ingress Controller vulnerability
CVE-2026-101019 6.5 MEDIUM NGINX ngx_http_js_module vulnerability
CVE-2026-96615 6.5 MEDIUM NGINX Gateway Fabric vulnerability
CVE-2026-97629 6.5 MEDIUM NGINX ngx_http_ssl_module vulnerability
CVE-2026-95101 5.3 MEDIUM NGINX ngx_http_v3_module vulnerability
CVE-2026-101025 5.3 MEDIUM NGINX ngx_http_js_module vulnerability

IV. Related Vulnerabilities

Same product: NGINX Ingress Controller
Same vendor: F5
Same weakness: CWE-303

V. Comments for CVE-2026-104939

No comments yet

Leave a comment