CVE-2026-112043

calcom cal.com/cal.diy Webhook util.ts createWebhookProcedure authorization

A weakness has been identified in calcom cal.com and cal.diy up to 6.2.0. Impacted is the function createWebhookProcedure of the file packages/trpc/server/routers/viewer/webhook/util.ts of the component Webhook Handler. Executing a manipulation of the argument ID can lead to authorization bypass. It is possible to launch the attack remotely. The pull request to fix this issue awaits acceptance.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Calcom

Products

Cal.com Cal.diy

CVE-2026-109143

calcom cal.com/cal.diy Credentials delete credentials.delete privileges management

A vulnerability was determined in calcom cal.com and cal.diy up to 6.2.0. This vulnerability affects the function credentials.delete of the file /api/trpc/credentials/delete of the component Credentials Handler. This manipulation of the argument teamId causes improper privilege management. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Calcom

Products

Cal.com Cal.diy

CVE-2026-104054

calcom cal.diy PBAC Permission BookingAccessService.ts doesUserIdHaveAccessToBooking authorization

A security flaw has been discovered in calcom cal.diy up to 6.2.0. This affects the function doesUserIdHaveAccessToBooking of the file BookingAccessService.ts of the component PBAC Permission Engine. Performing a manipulation results in missing authorization. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Calcom

Products

Cal.diy

CVE-2026-16624

CVE-2026-16624

Cal.com OSS ships lacks authorization on webhook teamId creation, allowing any authenticated user to create a webhook on any team via unvalidated teamId injection, then steal booking data, including fields like organizer/attendee emails and custom responses, and conditionally video-call passwords, by triggering webhook delivery.

CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed

Vendors

Calcom

Products

Cal.diy

CVE-2025-71389

Cal.com before 5.9.9 Remote Code Execution via RSC

Cal.com (calcom/cal.diy) before 5.9.9 is vulnerable to unauthenticated remote code execution because it bundles a version of Next.js whose React Server Components (RSC) request handling deserializes attacker-controlled input. A remote attacker can send a crafted RSC request to the server and cause arbitrary code to be executed during server-side processing, without authentication or user interaction. The flaw derives from the upstream Next.js vulnerability CVE-2025-55182 and is resolved in 5.9.9 by updating the affected dependency.

CVSS 4.0 · 10 Critical EPSS 1.4% KEV · Not listed

Vendors

Cal Calcom

Products

Cal.com Cal.diy

CVE-2024-58355

Cal.com through 4.7.15 Cross-Site Scripting via booking questions

Cal.com (calcom/cal.diy) versions through 4.7.15 contain a stored cross-site scripting vulnerability. The single booking view (e.g., https://app.cal.com/booking/<id>) renders booking-question field labels via React's dangerouslySetInnerHTML without sanitizing or escaping user input. An attacker who can create an event type with a malicious booking-question label can inject arbitrary HTML/JavaScript that executes when a victim opens the crafted booking URL. The issue is fixed in v4.7.16.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed

Vendors

Cal Calcom

Products

Cal.com Cal.diy

CVE-2024-58353

Cal.com through 4.7.15 Cross-Site Scripting via booking questions

Cal.com (repository calcom/cal.diy) in versions <= 4.7.15 is vulnerable to cross-site scripting (XSS) on the publicly accessible single booking view (e.g., /booking/<id>). Booking question (form field) labels are rendered via React's dangerouslySetInnerHTML without proper input sanitization or CSP, so an attacker who can create an event type with a malicious booking question label can inject arbitrary HTML/JavaScript that executes when a victim visits the booking view URL. Self-hosted instances with open registration are particularly at risk. The issue is fixed in version 4.7.16.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed

Vendors

Cal Calcom

Products

Cal.com Cal.diy

CVE-2024-58354

cal.com Repository Takeover via pull_request_target Workflow

cal.com (calcom repository, later renamed cal.diy) is affected by a repository takeover vulnerability in its GitHub Actions workflows. The workflow pr.yml uses the pull_request_target trigger with the repository's default write permissions and passes them down to check-types.yml. check-types.yml then performs a 'dangerous' checkout of the attacker-submitted pull request code (via the dangerous-git-checkout action) and subsequently executes it (through yarn install and package.json scripts). An attacker can open a pull request whose code runs arbitrary commands with the repository's write-scoped GITHUB_TOKEN, allowing them to push commits, merge or mutate pull requests, add or delete comments, and delete or force-push branches, thereby compromising the repository. The main branch is affected; no patched version is available.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed

Vendors

Calcom

Products

Cal.diy

CVE-2026-63768

cal.diy 6.2.0 Conferencing OAuth Callback Open Redirect via Unsigned State

cal.diy through 6.2.0 contains an open redirect vulnerability in the conferencing OAuth callback endpoint that allows attackers to redirect users to arbitrary URLs by crafting malicious state parameters. Attackers can exploit the unsigned state parameter and onErrorReturnTo field to silently redirect visitors from the trusted domain to attacker-controlled URLs for phishing attacks.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Calcom

Products

Cal.diy

CVE-2026-9303

calcom cal.diy cross-site request forgery

A vulnerability was identified in calcom cal.diy up to 4.9.4. Impacted is an unknown function. The manipulation leads to cross-site request forgery. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Calcom

Products

Cal.diy

CVE-2026-9304

calcom cal.diy Logo API route.ts validateUrlForSSRF server-side request forgery

A security flaw has been discovered in calcom cal.diy up to 4.9.4. The affected element is the function validateUrlForSSRF of the file apps/web/app/api/logo/route.ts of the component Logo API. The manipulation results in server-side request forgery. It is possible to launch the attack remotely. Attacks of this nature are highly complex. The exploitability is described as difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed

Vendors

Calcom

Products

Cal.diy

CVE-2026-9349

calcom cal.diy Generic React API bookings-single-view.getServerSideProps.tsx getServerSideProps information disclosure

A vulnerability was determined in calcom cal.diy up to 4.9.4. Affected by this issue is the function getServerSideProps of the file apps/web/modules/bookings/views/bookings-single-view.getServerSideProps.tsx of the component Generic React API. This manipulation of the argument cancelledBy/rescheduledBy causes information disclosure. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Calcom

Products

Cal.diy