← Vulnerability feed

Vulnerability record · CVE-2026-33143 · published 20 March 2026

CVE-2026-33143: Hackerbay oneuptime insufficient verification of data authenticity vulnerability

Hackerbay · Oneuptime

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.

8.7 CVSS 4.0 High EPSS 0.20% · top 91.4% CWE-345 · Insufficient verification of data authenticity
8.7CVSS 4.0 base score
0.20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/OneUptime/oneuptime/security/advisories/GHSA-g5ph-f57v-mwjc ExploitVendor Advisory

Track CVE-2026-33143 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-33396Hackerbay oneuptime os command injection vulnerabilityOneUptime is an open-source monitoring and observability platform. Prior to version 10.0.35, a low-privileged authenticated user (ProjectMember) can …EPSS 1.2%9.9CVE-2026-32306Hackerbay oneuptime sql injection vulnerabilityOneUptime is a solution for monitoring and managing online services. Prior to 10.0.23, the telemetry aggregation API accepts user-controlled aggregat…EPSS 0.91%9.9CVE-2026-30956Hackerbay oneuptime improper authorization vulnerabilityOneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, a low‑privileged user can bypass authorization and tenant isol…EPSS 0.47%9.9CVE-2026-30957Hackerbay oneuptime vulnerabilityOneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, OneUptime Synthetic Monitors allow a low-privileged authentica…EPSS 1.1%9.9CVE-2026-30921Hackerbay oneuptime vulnerabilityOneUptime is a solution for monitoring and managing online services. Prior to 10.0.20, OneUptime Synthetic Monitors allow low-privileged project user…EPSS 0.52%9.9CVE-2026-30887Hackerbay oneuptime code injection vulnerabilityOneUptime is a solution for monitoring and managing online services. Prior to 10.0.18, OneUptime allows project members to run custom Playwright/Java…EPSS 0.56%9.9CVE-2026-27574Hackerbay oneuptime code injection vulnerabilityOneUptime is a solution for monitoring and managing online services. In versions 9.5.13 and below, custom JavaScript monitor feature uses Node.js's n…EPSS 0.62%9.2CVE-2026-35053Hackerbay oneuptime missing authentication for critical function vulnerabilityOneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, the Worker service's ManualAPI exposes workflow executio…EPSS 0.82%

Source: NIST National Vulnerability Database (record CVE-2026-33143), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.