CVE-2026-78139Network attack vector

Authenticated stock-alert unsubscription via unchecked ownership

Published Aug 27, 2026 · Updated Aug 27, 2026

Authorization bypass in MultiVendorX Notifima before 3.1.4 allows remote authenticated users to unsubscribe arbitrary stock-alert customers. The unsubscribe REST handler trusts a caller-supplied subscription identifier and applies the unsubscription operation without confirming that the record belongs to the caller. Subscriber-level access is sufficient, and exploitation stops restock alerts for chosen customers without exposing or changing other account data.

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

What happened

Authorization bypass in MultiVendorX Notifima before 3.1.4 allows remote authenticated users to unsubscribe arbitrary stock-alert customers. The unsubscribe REST handler trusts a caller-supplied subscription identifier and applies the unsubscription operation without confirming that the record belongs to the caller. Subscriber-level access is sufficient, and exploitation stops restock alerts for chosen customers without exposing or changing other account data.

The record

CVE
CVE-2026-78139
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
MultiVendorX
Product
Notifima
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <3.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MultiVendorX · Notifimaversion=0 <3.1.4

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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