CVE-2026-16291Public exploitNetwork attack vector

Authenticated cross-user notification deletion via missing ownership check

Published Aug 2, 2026 · Updated Aug 2, 2026

Broken access control in Metagauss ProfileGrid before 5.9.9.8 allows remote authenticated users to delete other users' notifications. The pm_delete_notification action accepts an enumerated notification identifier without verifying that the referenced notification belongs to the requester. Any logged-in user, including a Subscriber, can remove sequentially identified notifications belonging to other accounts.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Broken access control in Metagauss ProfileGrid before 5.9.9.8 allows remote authenticated users to delete other users' notifications. The pm_delete_notification action accepts an enumerated notification identifier without verifying that the referenced notification belongs to the requester. Any logged-in user, including a Subscriber, can remove sequentially identified notifications belonging to other accounts.

The record

CVE
CVE-2026-16291
Published
Aug 2, 2026
Updated
Aug 2, 2026
Vendor
EventPrime Events
Product
ProfileGrid
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <5.9.9.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

EventPrime Events · ProfileGridversion=0 <5.9.9.8

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo