CVE-2026-30954Network attack vector

Cross-user data exposure via unscoped taxonomy lookup

Published Mar 10, 2026 · Updated Mar 10, 2026

Authorization bypass in Kovah LinkAce 2.1.0 and earlier allows remote authenticated users to attach private taxonomy data. LinkRepository.php processTaxonomy() sends positive integer tag and list IDs to an unrestricted model find(), omitting the current-user filter used for string entries. A valid account and a crafted link create, update, or API request are required; successful access exposes other users' tag or list names and IDs and creates cross-user associations.

CVSS severity5.3
Medium
EPSS probability0.20%
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 Kovah LinkAce 2.1.0 and earlier allows remote authenticated users to attach private taxonomy data. LinkRepository.php processTaxonomy() sends positive integer tag and list IDs to an unrestricted model find(), omitting the current-user filter used for string entries. A valid account and a crafted link create, update, or API request are required; successful access exposes other users' tag or list names and IDs and creates cross-user associations.

The record

CVE
CVE-2026-30954
Published
Mar 10, 2026
Updated
Mar 10, 2026
Vendor
Kovah
Product
LinkAce
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 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=<= 2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kovah · LinkAceversion=<= 2.1.0

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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