CVE-2026-81036

Stalwart Mail Server does not compare an OAuth redirect target against any registered destination in its default configuration. The validation routine in crates/http/src/auth/oauth/registration.rs returns success immediately when the client-authentication requirement is disabled, and that...

EUVD-2026-66612

Stalwart Mail Server does not compare an OAuth redirect target against any registered destination in its default configuration. The validation routine in crates/http/src/auth/oauth/registration.rs returns success immediately when the client-authentication requirement is disabled, and that...

CVE-2026-81036 Stalwart Mail Server through 0.16.19 Authorization Code Disclosure via Unvalidated OAuth redirect_uri

Stalwart Mail Server does not compare an OAuth redirect target against any registered destination in its default configuration. The validation routine in crates/http/src/auth/oauth/registration.rs returns success immediately when the client-authentication requirement is disabled, and that...

CVE-2026-81036 Stalwart Mail Server through 0.16.19 Authorization Code Disclosure via Unvalidated OAuth redirect_uri

Stalwart Mail Server does not compare an OAuth redirect target against any registered destination in its default configuration. The validation routine in crates/http/src/auth/oauth/registration.rs returns success immediately when the client-authentication requirement is disabled, and that...

CVE-2026-81036

Stalwart Mail Server through 0.16.19 fails to validate OAuth redirect_uri against registered destinations in its default configuration. The root cause lies in crates/http/src/auth/oauth/registration.rs, where the validation routine returns success immediately because the client-authentication req...

CVE-2026-81036 Stalwart Mail Server through 0.16.19 Authorization Code Disclosure via Unvalidated OAuth redirect_uri

Stalwart Mail Server does not compare an OAuth redirect target against any registered destination in its default configuration. The validation routine in crates/http/src/auth/oauth/registration.rs returns success immediately when the client-authentication requirement is disabled, and that...

PT-2026-82224

Name of the Vulnerable Software and Affected Versions Stalwart Mail Server affected versions not specified Description In its default configuration, the server fails to validate OAuth redirect targets against registered destinations. The validation routine in...

CVE-2026-81036: URL Redirection to Untrusted Site

Stalwart Mail Server does not compare an OAuth redirect target against any registered destination in its default configuration. The validation routine in crates/http/src/auth/oauth/registration.rs returns success immediately when the client-authentication requirement is disabled, and that...

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...

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...

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: Improper Neutralization of Input During Web Page Generation

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...

PT-2026-30729

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-2026-18531

Bulwark Webmail is a self-hosted webmail client for Stalwart Mail Server. Prior to version 1.4.10, the verifyIdentity function contained logic that returned true if no session cookies were present. This allowed unauthenticated attackers to bypass security checks and access/modify user settings vi...

CVE-2026-26312

Stalwart is a mail and collaboration server. A denial-of-service vulnerability exists in Stalwart Mail Server versions 0.13.0 through 0.15.4 where accessing a specially crafted email containing malformed nested message/rfc822 MIME parts via IMAP or JMAP causes excessive CPU and memory consumption...

CVE-2026-26312

Stalwart Mail Server vulnerable in versions 0.13.0–0.15.4 to an out-of-memory Denial-of-Service when processing specially crafted emails with malformed nested message/rfc822 MIME parts via IMAP or JMAP. The issue stems from the mail-parser crate producing cyclical references that the server then ...

CVE-2026-26312 Stalwart Mail Server has Out-of-Memory Denial of Service via Malformed Nested MIME Messages

Stalwart is a mail and collaboration server. A denial-of-service vulnerability exists in Stalwart Mail Server versions 0.13.0 through 0.15.4 where accessing a specially crafted email containing malformed nested message/rfc822 MIME parts via IMAP or JMAP causes excessive CPU and memory consumption...

CVE-2026-26312 Stalwart Mail Server has Out-of-Memory Denial of Service via Malformed Nested MIME Messages

Stalwart is a mail and collaboration server. A denial-of-service vulnerability exists in Stalwart Mail Server versions 0.13.0 through 0.15.4 where accessing a specially crafted email containing malformed nested message/rfc822 MIME parts via IMAP or JMAP causes excessive CPU and memory consumption...

CVE-2026-26312 Stalwart Mail Server has Out-of-Memory Denial of Service via Malformed Nested MIME Messages

Stalwart is a mail and collaboration server. A denial-of-service vulnerability exists in Stalwart Mail Server versions 0.13.0 through 0.15.4 where accessing a specially crafted email containing malformed nested message/rfc822 MIME parts via IMAP or JMAP causes excessive CPU and memory consumption...