HOMEVULNERABILITIESCVE-2026-33143
HIGH

CVE-2026-33143

CWE-345Published: March 20, 2026· Updated: Mar 23, 2026

7.5
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:6.6th

Official 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.

NVD Source

Technical Analysis

CVE-2026-33143 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Vendors & Products

hackerbay1 product
oneuptime
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://github.com/OneUptime/oneuptime/security/advisories/GHSA-g5ph-f57v-mwjc

All References (1)

→
https://github.com/OneUptime/oneuptime/security/advisories/GHSA-g5ph-f57v-mwjcExploit · Vendor Advisory

Quick Facts

CVE IDCVE-2026-33143
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-345
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedMar 20, 2026

Related CVEs (CWE-345)

CVE-2026-47691
10.0
CVE-2026-45674
10.0
CVE-2026-35051
10.0
CVE-2026-50195
9.9
CVE-2026-28454
9.8
CVE-2026-50214
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-33143 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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