CVE-2026-33143highCWE-345

CVE-2026-33143: high-severity vulnerability in oneuptime

OneUptime: WhatsApp Webhook Missing Signature Verification

Published · Updated

Follow this CVE+ Monitor oneuptime+ Monitor oneuptime

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7epss 0.2%
OneUptime is a solution for monitoring and managing online services. Prior to version 10.0.34, the WhatsApp POST webhook handler (/notification/whatsapp/webhook) processes incoming status update events without verifying the Meta/WhatsApp X-Hub-Signature-256 HMAC signature, allowing any unauthenticated attacker to send forged webhook payloads that manipulate notification delivery status records, suppress alerts, and corrupt audit trails. The codebase already implements proper signature verification for Slack webhooks. This issue has been patched in version 10.0.34.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
OneUptime · oneuptime
Related CVEs — oneuptime

In the same product, most dangerous first.

CVE-2026-27728CRITICALOneUptime: OS Command Injection in Probe NetworkPathMonitor via unsanitized destination in traceroute exec()EPSS 2.0%CVE-2026-30957CRITICALOneUptime Synthetic Monitor RCE via exposed Playwright browser objectEPSS 1.3%CVE-2026-30958HIGHOneUptime: Path Traversal — Arbitrary File Read (No Auth)EPSS 1.2%CVE-2026-33396CRITICALOneUptime has sandbox escape in Synthetic Monitor Playwright runtime allows project members to execute arbitrary commands on ProbeEPSS 0.8%CVE-2026-32306CRITICALOneUptime ClickHouse SQL Injection via Aggregate Query ParametersEPSS 0.7%CVE-2024-29194HIGHOneUptime Vulnerable to a Privilege Escalation via Local Storage Key ManipulationEPSS 0.7%