PraisonAI: Webhook signature verification skipped (fail-open) when secret unset, allowing forged inbound webhooks (WhatsApp & Linear bots)

The WhatsApp and Linear bot adapters verify the inbound webhook HMAC signature onlywhen a secret is configured. When the secret environment variable is unset — thedefault on a fresh install and common in development — verification is skipped entirelyand the webhook body is parsed and dispatched a...

Improper Authentication

PraisonAI is vulnerable to Improper Authentication. The vulnerability is due to missing verification of Svix webhook signatures, where crafted webhook requests are accepted without authentication, allowing unauthenticated attackers to forge message.received events and invoke configured agents wit...

PT-2026-60139

PraisonAI before 4.6.78 fails to verify Svix webhook signatures in AgentMail webhook mode, allowing unauthenticated attackers to forge message.received events. Attackers can send crafted JSON payloads to the webhook endpoint to invoke configured agents with arbitrary sender addresses and message...

CVE-2026-56360 n8n - Webhook Forgery via Unsigned POST Requests in ZendeskTrigger

n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious data...

Timing Attack

Overview pay is a package for processing payments in Ruby on Rails apps Affected versions of this package are vulnerable to Timing Attack via the validsignature? function. An attacker can recover valid webhook signatures by sending multiple requests with crafted Paddle-Signature header values and...

CVE-2026-56244

Capgo before 12.128.2 allows non-admin API keys to read webhook signing secrets via Supabase REST due to insufficient row-level security policies on the webhooks table. Attackers can retrieve the webhook secret and forge valid X-Capgo-Signature headers to send authenticated webhook events to...

Improper Verification of Cryptographic Signature

Overview Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature due to the lack of exposure of the HMAC-SHA256 signing key in the SDK's typed API, which prevents verification of the X-AxonFlow-Signature header on incoming webhook deliveries. An attack...

Duplicate Advisory: OpenClaw: Telnyx Webhook Replay Detection Bypass via Base64 Signature Re-encoding

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-37v6-fxx8-xjmx. This link is maintained to preserve external references. Original Description OpenClaw before 2026.3.31 contains a replay detection bypass vulnerability in webhook signature handling that treats...

GHSA-M958-864J-XQ5W Duplicate Advisory: OpenClaw: Telnyx Webhook Replay Detection Bypass via Base64 Signature Re-encoding

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-37v6-fxx8-xjmx. This link is maintained to preserve external references. Original Description OpenClaw before 2026.3.31 contains a replay detection bypass vulnerability in webhook signature handling that treats...

EUVD-2026-25335

OpenClaw before 2026.3.31 contains a replay detection bypass vulnerability in webhook signature handling that treats Base64 and Base64URL encoded signatures as distinct requests. Attackers can re-encode Telnyx webhook signatures to bypass replay detection while maintaining valid signature...

CVE-2026-41351

OpenClaw before 2026.3.31 contains a replay detection bypass vulnerability in webhook signature handling that treats Base64 and Base64URL encoded signatures as distinct requests. Attackers can re-encode Telnyx webhook signatures to bypass replay detection while maintaining valid signature...

PT-2026-34782

OpenClaw before 2026.3.31 contains a replay detection bypass vulnerability in webhook signature handling that treats Base64 and Base64URL encoded signatures as distinct requests. Attackers can re-encode Telnyx webhook signatures to bypass replay detection while maintaining valid signature...

CVE-2026-35640

OpenClaw before 2026.3.25 parses JSON request bodies before validating webhook signatures, allowing unauthenticated attackers to force resource-intensive parsing operations. Remote attackers can send malicious webhook requests to trigger denial of service by exhausting server resources through...

CVE-2026-35640: Incorrect Behavior Order

OpenClaw before 2026.3.25 parses JSON request bodies before validating webhook signatures, allowing unauthenticated attackers to force resource-intensive parsing operations. Remote attackers can send malicious webhook requests to trigger denial of service by exhausting server resources through...

Replay Attack

Overview @openclaw/voice-call is an OpenClaw voice-call plugin Affected versions of this package are vulnerable to Replay Attack via the webhook signature verification process. An attacker can bypass replay detection by submitting requests with equivalent Base64 and Base64URL-encoded signatures,...

Replay Attack

Overview openclaw is a 🦞 OpenClaw — Personal AI Assistant Affected versions of this package are vulnerable to Replay Attack via the webhook signature verification process. An attacker can bypass replay detection by submitting requests with equivalent Base64 and Base64URL-encoded signatures, causi...

BIT-DISCOURSE-2026-26078 Discourse has authentication bypass vulnerability in the Patreon plugin webhook endpoint

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...

CVE-2026-1461

The Simple Membership plugin for WordPress is vulnerable to Improper Handling of Missing Values in all versions up to, and including, 4.7.0 via the Stripe webhook handler. This is due to the plugin only validating webhook signatures when the stripe-webhook-signing-secret setting is configured,...

EUVD-2022-6379

Malicious code in bioql PyPI...

CVE-2025-53548 @clerk/backend Performs Insufficient Verification of Data Authenticity

Clerk helps developers build user management. Applications that use the verifyWebhook helper to verify incoming Clerk webhooks are susceptible to accepting improperly signed webhook events. The issue was resolved in @clerk/backend 2.4.0...