N-able N-central - Access Control Bypass via Path Confusion and Forwarded Header Spoofing

A vulnerability in the N-central internal API access control filter allows unauthorised access to internal APIs. This is fixed in N-central 2026.3 HF3 and 2026.4 id: CVE-2026-86206 info: name: N-able N-central - Access Control Bypass via Path Confusion and Forwarded Header Spoofing author:...

CVE-2026-55652 Wekan: Header-login IP allowlist bypass via X-Forwarded-For spoofing in Wekan allows unauthenticated full account takeover (incl. admin)

Wekan is open source kanban built with Meteor. Prior to 9.46, header-login with HEADERLOGINTRUSTEDIPS uses getRequestIp in server/lib/headerLoginAuth.js to trust the client-supplied X-Forwarded-For header before the real socket address, allowing an unauthenticated attacker to send HEADERLOGINID f...

CVE-2026-55652 Wekan: Header-login IP allowlist bypass via X-Forwarded-For spoofing in Wekan allows unauthenticated full account takeover (incl. admin)

Wekan is open source kanban built with Meteor. Prior to 9.46, header-login with HEADERLOGINTRUSTEDIPS uses getRequestIp in server/lib/headerLoginAuth.js to trust the client-supplied X-Forwarded-For header before the real socket address, allowing an unauthenticated attacker to send HEADERLOGINID f...

PYSEC-2026-1553 Litestar X-Forwarded-For Header Spoofing Vulnerability Enables Rate Limit Evasion

While testing Litestar's RateLimitMiddleware, I discovered that rate limits can be completely bypassed by manipulating the X-Forwarded-For header. This renders IP-based rate limiting ineffective against determined attackers. The Problem Litestar's RateLimitMiddleware uses cachekeyfromrequest to...

Insufficient Verification of Data Authenticity

Overview Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity via the realIP function. An attacker can gain unauthorized access to restricted resources, evade rate limiting, or manipulate security logs by supplying a crafted X-Forwarded-For header...

EUVD-2026-36708

The Wertheim SafeController Software, AssemblyVersion 6.15.8328.28014, contains an IP restriction bypass vulnerability in the login process. The application restricts user logins based on the IP address associated with a branch location, but the client IP address is derived from the HTTP...

EUVD-2026-29725

Cleanuparr is a tool for automating the cleanup of unwanted or blocked files in Sonarr, Radarr, and supported download clients like qBittorrent. Prior to 2.9.10, TrustedNetworkAuthenticationHandler.ResolveClientIp parses the leftmost entry of the X-Forwarded-For header as the client IP. That entr...

BIT-AUTHENTIK-2023-36456 Authentik lacks Proxy IP headers validation

authentik is an open-source Identity Provider. Prior to versions 2023.4.3 and 2023.5.5, authentik does not verify the source of the X-Forwarded-For and X-Real-IP headers, both in the Python code and the go code. Only authentik setups that are directly accessible by users without a reverse proxy a...

OAuth2 Proxy has an Authentication Bypass via X-Forwarded-Uri Header Spoofing

Impact A configuration-dependent authentication bypass exists in OAuth2 Proxy. Deployments are affected when all of the following are true: OAuth2 Proxy is configured with --reverse-proxy and at least one rule is defined with --skipauthroutes or the legacy --skip-auth-regex OAuth2 Proxy may trust...

CVE-2026-35656 OpenClaw < 2026.3.22 - XFF Loopback Spoofing Bypass in Canvas Authentication and Rate Limiter

OpenClaw before 2026.3.22 contains an authentication bypass vulnerability in the X-Forwarded-For header processing when trustedProxies is configured, allowing attackers to spoof loopback hops. Remote attackers can inject forged forwarding headers to bypass canvas authentication and rate-limiting...

CVE-2026-27824

CVE-2026-27824 affects calibre (Content Server) prior to version 9.4.0 where brute-force protection derives its ban key from both remote_addr and X-Forwarded-For. Because X-Forwarded-For is read directly from the HTTP request without validation or trusted-proxy checks, an attacker can bypass IP-b...

CVE-2026-27824 calibre has IP Ban Bypass via X-Forwarded-For Header Spoofing

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.4.0, the calibre Content Server's brute-force protection mechanism uses a ban key derived from both remoteaddr and the X-Forwarded-For header. Since the X-Forwarded-For header i...

CVE-2026-23848

MyTube is a self-hosted downloader and player for several video websites. Prior to version 1.7.71, a rate limiting bypass via X-Forwarded-For header spoofing allows unauthenticated attackers to bypass IP-based rate limiting on general API endpoints. Attackers can spoof client IPs by manipulating...

CVE-2025-66508 1Panel IP Access Control Bypass via Untrusted X-Forwarded-For Headers

1Panel is an open-source, web-based control panel for Linux server management. Versions 2.0.14 and below use Gin's default configuration which trusts all IP addresses as proxies TrustedProxies = 0.0.0.0/0, allowing any client to spoof the X-Forwarded-For header. Since all IP-based access controls...

1Panel IP Access Control Bypass via Untrusted X-Forwarded-For Headers

Summary The server trusts all reverse-proxy headers by default, so any remote client can spoof X-Forwarded-For to bypass IP-based protections AllowIPs, API IP whitelist, “localhost-only” checks. All IP-based access control becomes ineffective. Details - Gin is created with defaults gin.Default,...

GHSA-7CQV-QCQ2-R765 1Panel IP Access Control Bypass via Untrusted X-Forwarded-For Headers

Summary The server trusts all reverse-proxy headers by default, so any remote client can spoof X-Forwarded-For to bypass IP-based protections AllowIPs, API IP whitelist, “localhost-only” checks. All IP-based access control becomes ineffective. Details - Gin is created with defaults gin.Default,...

1Panel IP Access Control Bypass via Untrusted X-Forwarded-For Headers

The server trusts all reverse-proxy headers by default, so any remote client can spoof X-Forwarded-For to bypass IP-based protections AllowIPs, API IP whitelist, “localhost-only” checks. All IP-based access control becomes ineffective...

Litestar X-Forwarded-For Header Spoofing Vulnerability Enables Rate Limit Evasion

While testing Litestar's RateLimitMiddleware, I discovered that rate limits can be completely bypassed by manipulating the X-Forwarded-For header. This renders IP-based rate limiting ineffective against determined attackers. The Problem Litestar's RateLimitMiddleware uses cachekeyfromrequest to...

Authentication Bypass

Apache ZooKeeper is vulnerable to Authentication Bypass. The vulnerability is due to weak client IP address validation in IPAuthenticationProvider, where the Admin Server trusts the X-Forwarded-For HTTP header by default, allowing attackers to spoof their IP address and bypass IP-based...

DEBIAN-CVE-2024-51504

When using IPAuthenticationProvider in ZooKeeper Admin Server there is a possibility of Authentication Bypass by Spoofing -- this only impacts IP based authentication implemented in ZooKeeper Admin Server. Default configuration of client's IP address detection in IPAuthenticationProvider, which...