PYSEC-2026-300 Browser Use allows bypassing `allowed_domains` by putting a decoy domain in http auth username portion of a URL

Summary During a manual source code review, ARIMLABS.AI researchers identified that the browseruse module includes an embedded whitelist functionality to restrict URLs that can be visited. This restriction is enforced during agent initialization. However, it was discovered that these measures can...

CVE-2026-56348 n8n - Credential Exfiltration via Allowed HTTP Request Domains Bypass in Dynamic Node Parameters Endpoint

n8n before 2.20.0 contains a credential exfiltration vulnerability in the POST /rest/dynamic-node-parameters/options endpoint that allows authenticated users to bypass Allowed HTTP Request Domains restrictions. Attackers with credential access can cause the n8n server to issue HTTP requests with...

CVE-2026-56348

CVE-2026-56348 affects n8n prior to 2.20.0. A vulnerability in POST /rest/dynamic-node-parameters/options allows an authenticated user to bypass Allowed HTTP Request Domains restrictions, enabling the server to issue HTTP requests with credentials to unauthorized hosts. This can lead to credentia...

CVE-2026-54299

Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages /404 or /500 using export const prerender = true fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming...

CVE-2026-54299

Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages /404 or /500 using export const prerender = true fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming...

Astro: Host header SSRF in prerendered error page fetch

Summary Astro SSR apps with prerendered error pages /404 or /500 using export const prerender = true fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming Host header. When the Host header i...

PT-2026-49740

Name of the Vulnerable Software and Affected Versions Astro versions prior to 6.4.6 Description Astro SSR applications using prerendered error pages, such as '/404' or '/500' with export const prerender = true, fetch these pages over HTTP at runtime during an error. The fetch URL is derived from...

CVE-2026-6689

Mattermost versions 11.6.x = 11.6.1, 11.5.x = 11.5.4, 10.11.x = 10.11.15, 10.11.x = 10.11.16 Fail to enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation the check was only applied on update/patch, which allows an authenticated user holding...

EUVD-2026-36501

Mattermost versions 11.6.x = 11.6.1, 11.5.x = 11.5.4, 10.11.x = 10.11.15, 10.11.x = 10.11.16 Fail to enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation the check was only applied on update/patch, which allows an authenticated user holding...

CVE-2026-6689

Mattermost vulnerable versions: 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x

CVE-2026-6689 *Missing* {{invite_user}} *permission check on team creation allows unprivileged users to set open-invite and allowed-domains team settings*

Mattermost versions 11.6.x = 11.6.1, 11.5.x = 11.5.4, 10.11.x = 10.11.15, 10.11.x = 10.11.16 Fail to enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation the check was only applied on update/patch, which allows an authenticated user holding...

CVE-2026-6689 *Missing* {{invite_user}} *permission check on team creation allows unprivileged users to set open-invite and allowed-domains team settings*

Mattermost versions 11.6.x = 11.6.1, 11.5.x = 11.5.4, 10.11.x = 10.11.15, 10.11.x = 10.11.16 Fail to enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation the check was only applied on update/patch, which allows an authenticated user holding...

PT-2026-48937

Name of the Vulnerable Software and Affected Versions Mattermost versions 11.6.0 through 11.6.1 Mattermost versions 11.5.0 through 11.5.4 Mattermost versions 10.11.0 through 10.11.16 Description An issue exists where the system fails to enforce the PermissionInviteUser check when setting...

NPM: n8n: Credential exfiltration via Allowed HTTP Request Domains Bypass

NPM: n8n: Credential exfiltration via Allowed HTTP Request Domains Bypass vulnerability discovered by ? in WordPress Npm n8n versions 2.20.0...

GHSA-3875-8GCX-7V46 n8n: Credential exfiltration via Allowed HTTP Request Domains Bypass

Impact The POST /rest/dynamic-node-parameters/options endpoint allowed any authenticated user to cause the n8n server to issue HTTP requests including credentials bypassing the intended restrictions on which hosts could be contacted for that credential Allowed HTTP Request Domains. The user neede...

n8n: Credential exfiltration via Allowed HTTP Request Domains Bypass

Impact The POST /rest/dynamic-node-parameters/options endpoint allowed any authenticated user to cause the n8n server to issue HTTP requests including credentials bypassing the intended restrictions on which hosts could be contacted for that credential Allowed HTTP Request Domains. The user neede...

CVE-2026-33393

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the allowedspamhostdomains check used Stringendwith? without domain boundary validation, allowing domains like attacker-example.com to bypass spam protection when example.com was...

EUVD-2026-13338

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the allowedspamhostdomains check used Stringendwith? without domain boundary validation, allowing domains like attacker-example.com to bypass spam protection when example.com was...

league/commonmark has an embed extension allowed_domains bypass

Impact The DomainFilteringAdapter in the Embed extension is vulnerable to an allowlist bypass due to a missing hostname boundary assertion in the domain-matching regex. An attacker-controlled domain like youtube.com.evil passes the allowlist check when youtube.com is an allowed domain. This enabl...

GHSA-HH8V-HGVP-G3F5 league/commonmark has an embed extension allowed_domains bypass

Impact The DomainFilteringAdapter in the Embed extension is vulnerable to an allowlist bypass due to a missing hostname boundary assertion in the domain-matching regex. An attacker-controlled domain like youtube.com.evil passes the allowlist check when youtube.com is an allowed domain. This enabl...