CVE-2026-54450 ToolHive: SSRF guard misses IPv6 NAT64 ranges (64:ff9b::/96, 64:ff9b:1::/48), allowing metadata/internal access behind a NAT64 gateway

ToolHive is a utility designed to simplify the deployment and management of Model Context Protocol MCP servers. Prior to 0.29.1, networking.IsPrivateIP in pkg/networking/utilities.go omits the IPv6 NAT64 prefixes 64:ff9b::/96 and 64:ff9b:1::/48, so NAT64 addresses embedding private, loopback, or...

CVE-2026-77866 SSRF protection bypass in safeurl via IPv6 addresses and unresolvable hosts

Server-Side Request Forgery SSRF vulnerability in Slab safeurl allows an attacker who controls a validated URL to reach internal network destinations the library is configured to block. Only IPv4 addresses are matched against the reserved ranges and the blocklist. Every other address is treated a...

CVE-2026-77866 SSRF protection bypass in safeurl via IPv6 addresses and unresolvable hosts

Server-Side Request Forgery SSRF vulnerability in Slab safeurl allows an attacker who controls a validated URL to reach internal network destinations the library is configured to block. Only IPv4 addresses are matched against the reserved ranges and the blocklist. Every other address is treated a...

EEF-CVE-2026-77866 SSRF protection bypass in safeurl via IPv6 addresses and unresolvable hosts

Summary Server-Side Request Forgery SSRF vulnerability in Slab safeurl allows an attacker who controls a validated URL to reach internal network destinations the library is configured to block. Only IPv4 addresses are matched against the reserved ranges and the blocklist. Every other address is...

EUVD-2026-78678

Server-Side Request Forgery SSRF vulnerability in Slab safeurl allows an attacker who controls a validated URL to reach internal network destinations the library is configured to block. Only IPv4 addresses are matched against the reserved ranges and the blocklist. Every other address is treated a...

CVE-2026-77866 SSRF protection bypass in safeurl via IPv6 addresses and unresolvable hosts

Server-Side Request Forgery SSRF vulnerability in Slab safeurl allows an attacker who controls a validated URL to reach internal network destinations the library is configured to block. Only IPv4 addresses are matched against the reserved ranges and the blocklist. Every other address is treated a...

CVE-2026-77866

Slab safeurl (an Elixir library, affected from version 0.1.0 onward) contains a Server-Side Request Forgery (SSRF) protection bypass that allows an attacker controlling a validated URL to reach internal network destinations the library is configured to block. The root cause is that only IPv4 addr...

CVE-2026-59973 mcp-from-openapi: Bypass of OpenAPI external $ref SSRF fix in latest FrontMCP and mcp-from-openapi

FrontMCP is a TypeScript-first framework for the Model Context Protocol MCP. From mcp-from-openapi 2.3.0 until 2.5.0 and from frontmcp and @frontmcp/adapters 1.2.1 until 1.5.0, libs/adapters/src/openapi/openapi.adapter.ts loadOpenAPISpec forwards untrusted OpenAPI url and spec inputs and...

grafana: Grafana Auth Proxy: Unauthorized access due to incorrect IPv6 allow-list default

A flaw in Grafana's Auth Proxy IPv6 allow-list incorrectly defaults to a broad /32 subnet mask instead of a strict /128. This misconfiguration allows remote attackers to bypass access restrictions, potentially leading to unauthorized access and data manipulation...

Important: Red Hat Security Advisory: grafana security update

An update for grafana is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

grafana: Grafana Auth Proxy: Unauthorized access due to incorrect IPv6 allow-list default

A flaw in Grafana's Auth Proxy IPv6 allow-list incorrectly defaults to a broad /32 subnet mask instead of a strict /128. This misconfiguration allows remote attackers to bypass access restrictions, potentially leading to unauthorized access and data manipulation...

USN-8730-2 linux-azure vulnerability

A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems: - IPv6 networking; - Netfilter;...

USN-8730-2: Linux kernel (Azure) vulnerability

A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems: - IPv6 networking; - Netfilter;...

DEBIAN-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...

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 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...

EUVD-2026-78300

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

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...