CVE-2026-113728

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.9.2, the unauthenticated POST /api/fetch-ical endpoint validates a caller-supplied hostname with one DNS lookup and then passes the URL to fetch, which performs a separate lookup for the socket connection. An...

CVE-2026-113728 Bulwark Webmail: DNS-rebinding SSRF in public iCalendar fetch endpoint

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.9.2, the unauthenticated POST /api/fetch-ical endpoint validates a caller-supplied hostname with one DNS lookup and then passes the URL to fetch, which performs a separate lookup for the socket connection. An...

CVE-2026-113728

Versions of Bulwark Webmail prior to 1.9.2 are vulnerable to a DNS-rebinding SSRF in the public POST /api/fetch-ical endpoint. The root cause is a check-then-fetch pattern where the application performs one DNS lookup for validation and a second lookup for the socket connection; an attacker contr...

bulwark

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CVE-2026-35390

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the reverse proxy proxy.ts set the Content-Security-Policy-Report-Only header instead of the enforcing Content-Security-Policy header. This means cross-site scripting XSS attacks were logged but not blocked...

CVE-2026-35389

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, S/MIME signature verification did not validate the certificate trust chain checkChain: false. Any email signed with a self-signed or untrusted certificate was displayed as having a valid signature. This...

CVE-2026-35390

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the reverse proxy proxy.ts set the Content-Security-Policy-Report-Only header instead of the enforcing Content-Security-Policy header. This means cross-site scripting XSS attacks were logged but not blocked...

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-2026-35389

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, S/MIME signature verification did not validate the certificate trust chain checkChain: false. Any email signed with a self-signed or untrusted certificate was displayed as having a valid signature. This...

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

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 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-2026-19479

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the reverse proxy proxy.ts set the Content-Security-Policy-Report-Only header instead of the enforcing Content-Security-Policy header. This means cross-site scripting XSS attacks were logged but not blocked...

CVE-2026-35390 Content-Security-Policy was set to Report-Only mode, failing to block XSS attacks

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the reverse proxy proxy.ts set the Content-Security-Policy-Report-Only header instead of the enforcing Content-Security-Policy header. This means cross-site scripting XSS attacks were logged but not blocked...

CVE-2026-35390

This CVE concerns Bulwark Webmail (self-hosted for Stalwart Mail Server). Before 1.4.11, the reverse proxy (proxy.ts) sent Content-Security-Policy-Report-Only instead of the enforcing Content-Security-Policy, causing XSS protections to log but not block. As a result, an attacker able to inject sc...

CVE-2026-35390 Content-Security-Policy was set to Report-Only mode, failing to block XSS attacks

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, the reverse proxy proxy.ts set the Content-Security-Policy-Report-Only header instead of the enforcing Content-Security-Policy header. This means cross-site scripting XSS attacks were logged but not blocked...

CVE-2026-35389 Bulwark Webmail S/MIME signature verification accepted self-signed certificates

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to 1.4.11, S/MIME signature verification did not validate the certificate trust chain checkChain: false. Any email signed with a self-signed or untrusted certificate was displayed as having a valid signature. This...