CVE-2026-35391

CVE-2026-35391 affects Bulwark Webmail (lib/admin/session.ts getClientIP) prior to version 1.4.11. The function trusts the first (leftmost) entry of the X-Forwarded-For header, which is client-controlled. This allows an attacker to forge their source IP to bypass IP-based rate limiting (facilitat...

CVE-2026-35391

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the getClientIP function in lib/admin/session.ts trusted the first leftmost entry of the X-Forwarded-For header, which is fully controlled by the client. An attacker could forge their source IP address to...

CVE-2026-35391 Bulwark Webmail getClientIP() trusted client-controlled X-Forwarded-For value, enabling rate limit bypass and audit log forgery

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the getClientIP function in lib/admin/session.ts trusted the first leftmost entry of the X-Forwarded-For header, which is fully controlled by the client. An attacker could forge their source IP address to...

CVE-2026-35391 Bulwark Webmail getClientIP() trusted client-controlled X-Forwarded-For value, enabling rate limit bypass and audit log forgery

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the getClientIP function in lib/admin/session.ts trusted the first leftmost entry of the X-Forwarded-For header, which is fully controlled by the client. An attacker could forge their source IP address to...

EUVD-2026-19480

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the getClientIP function in lib/admin/session.ts trusted the first leftmost entry of the X-Forwarded-For header, which is fully controlled by the client. An attacker could forge their source IP address to...

CVE-2026-35391 Bulwark Webmail getClientIP() trusted client-controlled X-Forwarded-For value, enabling rate limit bypass and audit log forgery

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the getClientIP function in lib/admin/session.ts trusted the first leftmost entry of the X-Forwarded-For header, which is fully controlled by the client. An attacker could forge their source IP address to...

Bulwark Webmail security vulnerability

Bulwark Webmail is an open-source, self-hosted webmail client developed by Bulwark Mail. Versions of Bulwark Webmail prior to 1.4.11 contained security vulnerabilities. These vulnerabilities stemmed from the getClientIP function, which trusted the X-Forwarded-For header provided by the client. Th...

CVE-2026-35391: Use of Less Trusted Source

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the getClientIP function in lib/admin/session.ts trusted the first leftmost entry of the X-Forwarded-For header, which is fully controlled by the client. An attacker could forge their source IP address to...

Linux Distros Unpatched Vulnerability : CVE-2026-32762

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.2.6, Rack::Utils.forwardedvalues parses the RFC 72...

SUSE CVE-2026-32762

Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.2.6, Rack::Utils.forwardedvalues parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons...

CVE-2026-32762

A flaw was found in Rack, a modular Ruby web server interface. This vulnerability arises from improper parsing of the RFC 7239 Forwarded header, where semicolons within quoted values are incorrectly interpreted as delimiters. An attacker can exploit this by crafting a malicious Forwarded header,...

EUVD-2026-18423

Rack: Forwarded Header semicolon injection enables Host and Scheme spoofing...

Rack: Forwarded Header semicolon injection enables Host and Scheme spoofing

Summary Rack::Utils.forwardedvalues parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons, a header such as: http Forwarded: for="127.0.0.1;host=evil.com;proto=https" can be interpreted by Rack as...

GHSA-QFGR-CRR9-7R49 Rack: Forwarded Header semicolon injection enables Host and Scheme spoofing

Summary Rack::Utils.forwardedvalues parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons, a header such as: http Forwarded: for="127.0.0.1;host=evil.com;proto=https" can be interpreted by Rack as...

Interpretation Conflict

Overview rack is a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between the so-called middleware into a singl...

CVE-2026-32762

Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.2.6, Rack::Utils.forwardedvalues parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons...

DEBIAN-CVE-2026-32762

Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.2.6, Rack::Utils.forwardedvalues parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons...

UBUNTU-CVE-2026-32762

Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.2.6, Rack::Utils.forwardedvalues parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons...

CVE-2026-32762

Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21 and 3.2.0 to before 3.2.6, Rack::Utils.forwardedvalues parses the RFC 7239 Forwarded header by splitting on semicolons before handling quoted-string values. Because quoted values may legally contain semicolons...

CVE-2026-32762

Rack is a modular Ruby web server interface. Vulnerability CVE-2026-32762 affects Rack::Utils.forwarded_values in versions 3.0.0.beta1–3.1.20 and 3.2.0–3.2.5, where the Forwarded header is parsed by splitting on semicolons before handling quoted values. Because semicolons may appear inside quoted...