CVE-2026-26077

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, several webhook endpoints SendGrid, Mailjet, Mandrill, Postmark, SparkPost in the WebhooksController accepted requests without a valid authentication token when no token was configured. This...

CVE-2026-26077

CVE-2026-26077 – Discourse webhook authentication bypass . Affects Discourse prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, where several webhook endpoints (SendGrid, Mailjet, Mandrill, Postmark, SparkPost) in the WebhooksController accepted requests without a valid authentication token whe...

CVE-2026-26077 Discourse doesn't ensure webhooks require a token

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, several webhook endpoints SendGrid, Mailjet, Mandrill, Postmark, SparkPost in the WebhooksController accepted requests without a valid authentication token when no token was configured. This...

CVE-2026-26077 Discourse doesn't ensure webhooks require a token

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, several webhook endpoints SendGrid, Mailjet, Mandrill, Postmark, SparkPost in the WebhooksController accepted requests without a valid authentication token when no token was configured. This...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the Actions V2 webhook. An attacker can access internal network resources and gather information about internal services by specifying target URLs that resolve to local hosts or internal IP addresses...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the Actions V2 webhook. An attacker can access internal network resources and gather information about internal services by specifying target URLs that resolve to local hosts or internal IP addresses...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the Actions V2 webhook. An attacker can access internal network resources and gather information about internal services by specifying target URLs that resolve to local hosts or internal IP addresses...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the Actions V2 webhook. An attacker can access internal network resources and gather information about internal services by specifying target URLs that resolve to local hosts or internal IP addresses...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the Actions V2 webhook. An attacker can access internal network resources and gather information about internal services by specifying target URLs that resolve to local hosts or internal IP addresses...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the Actions V2 webhook. An attacker can access internal network resources and gather information about internal services by specifying target URLs that resolve to local hosts or internal IP addresses...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the Actions V2 webhook. An attacker can access internal network resources and gather information about internal services by specifying target URLs that resolve to local hosts or internal IP addresses...

CVE-2026-27945 ZITADEL has potential SSRF via Actions

ZITADEL is an open source identity management platform. Zitadel Action V2 introduced as early preview in 2.59.0, beta in 3.0.0 and GA in 4.0.0 is a webhook based approach to allow developers act on API request to Zitadel and customize flows such the issue of a token. Zitadel's Action target URLs...

CVE-2026-25741: Incorrect Authorization

Zulip is an open-source team collaboration tool. Prior to commit bf28c82dc9b1f630fa8e9106358771b20a0040f7, the API endpoint for creating a card update session during an upgrade flow was accessible to users with only organization member privileges. When the associated Stripe Checkout session is...

PT-2026-23961

Impact An attacker who knows the webhook URL of a workflow using the GitHub Webhook Trigger node could send unsigned POST requests and trigger the workflow with arbitrary data. The node did not implement the HMAC-SHA256 signature verification that GitHub provides to authenticate webhook deliverie...

CVE-2026-26077: Improper Authentication

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, several webhook endpoints SendGrid, Mailjet, Mandrill, Postmark, SparkPost in the WebhooksController accepted requests without a valid authentication token when no token was configured. This...

CVE-2026-26078: Authorization Bypass Through User-Controlled Key

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, when the patreonwebhooksecret site setting is blank, an attacker can forge valid webhook signatures by computing an HMAC-MD5 with an empty string as the key. Since the request body is known to th...

PT-2026-22153

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2025.12.2 Discourse versions prior to 2026.1.1 Discourse versions prior to 2026.2.0 Description Discourse, an open source discussion platform, is susceptible to a security issue. When the patreon webhook secret site...

PT-2026-22150

Name of the Vulnerable Software and Affected Versions Discourse versions prior to 2025.12.2 Discourse versions prior to 2026.1.1 Discourse versions prior to 2026.2.0 Description Discourse is an open source discussion platform. Several webhook endpoints—SendGrid, Mailjet, Mandrill, Postmark,...

Discourse security vulnerabilities

Discourse is an open-source community discussion platform developed by Discourse. This platform includes features such as communities, email communication, and chat rooms. Versions of Discourse before 2025.12.2, 2026.1.1, and 2026.2.0 contained security vulnerabilities. These vulnerabilities...

Discourse authorization issue vulnerabilities

Discourse is an open-source community discussion platform developed by Discourse. This platform includes features such as communities, email communication, and chat rooms. Versions of Discourse before 2025.12.2, 2026.1.1, and 2026.2.0 have vulnerabilities related to authorization. These...