CVE-2026-90711

proxy-addr is a Node.js module that determines a request's client address behind trusted reverse proxies, and it backs Express req.ip and req.ips. In versions 1.1.0 through 2.0.7, a trust subnet written in IPv4-mapped IPv6 notation with an IPv4-sized prefix, such as ::ffff:10.0.0.0/8 instead of t...

User Impersonation

Overview Affected versions of this package are vulnerable to User Impersonation in its subnet matching logic, where an IPv4-mapped IPv6 trust entry with a short prefix such as ::ffff:10.0.0.0/8 compiles with all-zero leading bits and matches every address rather than the intended block. An attack...

CVE-2026-90711

proxy-addr is a Node.js module that backs Express req.ip and req.ips. In versions 1.1.0 through 2.0.7 , a trust subnet written in IPv4-mapped IPv6 notation with an IPv4-sized prefix (e.g., ::ffff:10.0.0.0/8 instead of /104) is silently accepted, causing every IPv4 address to be treated as trusted...

CVE-2026-90711 proxy-addr vulnerable to IP spoofing via IPv4-mapped IPv6 trust subnet

proxy-addr is a Node.js module that determines a request's client address behind trusted reverse proxies, and it backs Express req.ip and req.ips. In versions 1.1.0 through 2.0.7, a trust subnet written in IPv4-mapped IPv6 notation with an IPv4-sized prefix, such as ::ffff:10.0.0.0/8 instead of t...

CVE-2026-90711 proxy-addr vulnerable to IP spoofing via IPv4-mapped IPv6 trust subnet

proxy-addr is a Node.js module that determines a request's client address behind trusted reverse proxies, and it backs Express req.ip and req.ips. In versions 1.1.0 through 2.0.7, a trust subnet written in IPv4-mapped IPv6 notation with an IPv4-sized prefix, such as ::ffff:10.0.0.0/8 instead of t...

CVE-2026-90711: Authentication Bypass by Spoofing

proxy-addr is a Node.js module that determines a request's client address behind trusted reverse proxies, and it backs Express req.ip and req.ips. In versions 1.1.0 through 2.0.7, a trust subnet written in IPv4-mapped IPv6 notation with an IPv4-sized prefix, such as ::ffff:10.0.0.0/8 instead of t...

PT-2026-91873

Name of the Vulnerable Software and Affected Versions proxy-addr versions 1.1.0 through 2.0.7 Description This Node.js module, which determines a request's client address behind trusted reverse proxies and supports Express req.ip and req.ips, contains a flaw where trust subnets written in...

PT-2026-98422

proxy-addr is a Node.js module that determines a request's client address behind trusted reverse proxies, and it backs Express req.ip and req.ips. In versions 1.1.0 through 2.0.7, a trust subnet written in IPv4-mapped IPv6 notation with an IPv4-sized prefix, such as ::ffff:10.0.0.0/8 instead of t...

Linux Distros Unpatched Vulnerability : CVE-2026-90711

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - proxy-addr is a Node.js module that determines a request's client address behind trusted reverse proxies, and it backs Express req.ip and req.ips. In versions...

axios: Axios: Proxy bypass via IPv4-mapped IPv6 address non-normalization

A flaw was found in Axios, a promise-based HTTP client. This vulnerability occurs because Axios does not properly normalize IPv4-mapped IPv6 addresses. When a NOPROXY setting is configured to block direct access to specific IPv4 addresses, an attacker can bypass this restriction by using the...

axios: Axios: Proxy bypass via IPv4-mapped IPv6 address non-normalization

A flaw was found in Axios, a promise-based HTTP client. This vulnerability occurs because Axios does not properly normalize IPv4-mapped IPv6 addresses. When a NOPROXY setting is configured to block direct access to specific IPv4 addresses, an attacker can bypass this restriction by using the...

PT-2026-89407

EspoCRM before 10.0.4 is vulnerable to server-side request forgery. HostCheck::ipAddressIsNotInternal, which validates outbound URLs to block requests to internal/private IP addresses, strips ::ffff: IPv4-mapped IPv6 prefixes but does not recognize IPv6 transition addresses that embed private IPv...

VulnCheck KEV: CVE-2026-60105

Monsta FTP before 2.14.5 contains a server-side request forgery vulnerability in the fetchRemoteFile action caused by an incomplete IP blocklist check in the isBlockedIP function, which fails to detect embedded IPv4 addresses within IPv4-mapped IPv6 addresses. An unauthenticated attacker can obta...

ip-address: ip-address: Server-Side Request Forgery via IPv4-mapped/NAT64 IPv6 address misclassification

A flaw was found in the ip-address library. This library, used for parsing and manipulating IPv4 and IPv6 addresses in JavaScript, is vulnerable to Server-Side Request Forgery SSRF due to incorrect classification of IPv4-mapped/NAT64 IPv6 addresses. An attacker could exploit this misclassificatio...

EUVD-2026-69788

Mailpit's IsInternalIP deny list function fails to block the Azure WireServer address 168.63.129.16 and the RFC 2765/6145 IPv4-translated IPv6 prefix, allowing server-side request forgery to internal destinations. Attackers can supply hostnames resolving to these addresses in message content to...

CVE-2026-52776

A flaw was found in compliance-trestle. The URLSecurityValidator, intended to prevent Server-Side Request Forgery SSRF, contains a bypass vulnerability. This bypass occurs because the validator does not properly handle IPv4-mapped IPv6 addresses or the unspecified address 0.0.0.0. A remote...

CVE-2026-80350

OneUptime's webhook target check rejects private and loopback addresses given in IPv4 form and a small set of IPv6 forms, but has no case for the IPv4-mapped IPv6 range. The webhook delivery path calls SSRFProtection.validateWebhookTargetIsSafe, and the host-literal screening inside...

CVE-2026-80350

OneUptime's webhook target check rejects private and loopback addresses given in IPv4 form and a small set of IPv6 forms, but has no case for the IPv4-mapped IPv6 range. The webhook delivery path calls SSRFProtection.validateWebhookTargetIsSafe, and the host-literal screening inside...

CVE-2026-80350

OneUptime before version 12.0.7 contains a Server-Side Request Forgery (SSRF) vulnerability in its webhook delivery path. The host-literal screening in Common/Server/Utils/SSRFProtection.ts (function isBlockedHostnameLiteral) rejects private and loopback IPv4 addresses and a limited set of IPv6 f...

CVE-2026-80350 OneUptime before 12.0.7 Server-Side Request Forgery via IPv4-Mapped IPv6 Webhook URL

OneUptime's webhook target check rejects private and loopback addresses given in IPv4 form and a small set of IPv6 forms, but has no case for the IPv4-mapped IPv6 range. The webhook delivery path calls SSRFProtection.validateWebhookTargetIsSafe, and the host-literal screening inside...