CVE-2026-33143 | THREATINT

Description

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.

PUBLISHED Reserved 2026-03-17 | Published 2026-03-20 | Updated 2026-03-24 | Assigner GitHub_M

HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-345: Insufficient Verification of Data Authenticity

Product status

< 10.0.34

affected

References

github.com/...uptime/security/advisories/GHSA-g5ph-f57v-mwjc

cve.org (CVE-2026-33143)

nvd.nist.gov (CVE-2026-33143)

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