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CVE-2026-33143

Hackerbay Oneuptime vulnerability

7.5 HIGHPublic exploitEPSS 0.20%
  1. Published20 Mar 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

Hackerbay Oneuptime< 10.0.34

Remediation

Fixed in
Hackerbay Oneuptime≥ 10.0.34

References

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Frequently asked

Is CVE-2026-33143 being actively exploited?

CVE-2026-33143 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.20%.

How severe is CVE-2026-33143?

CVE-2026-33143 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.20% probability of exploitation.

Which products are affected by CVE-2026-33143?

Affected products include Hackerbay Oneuptime.

How do I fix CVE-2026-33143?

Upgrade affected software to a fixed version, for example Hackerbay Oneuptime 10.0.34 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-33143 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.