CVE-2026-67358Network attack vector

Authenticated quota manipulation via cross-order record update

Published Aug 21, 2026 · Updated Aug 21, 2026

Authorization bypass in affected J2Store releases through 4.1.5 allows remote authenticated users to alter other orders' download quotas. The download endpoint accepts a valid order token but increments the limit counter for a download record belonging to another order without binding that record to the token. Authentication and a valid order token are required; the endpoint also omits CSRF validation, and the demonstrated consequence is quota manipulation only.

CVSS severity5.3
Medium
EPSS probability0.16%
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 affected J2Store releases through 4.1.5 allows remote authenticated users to alter other orders' download quotas. The download endpoint accepts a valid order token but increments the limit counter for a download record belonging to another order without binding that record to the token. Authentication and a valid order token are required; the endpoint also omits CSRF validation, and the demonstrated consequence is quota manipulation only.

The record

CVE
CVE-2026-67358
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
J2Commerce
Product
J2Store
Classifications
CWE-639, CWE-352, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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=1.0.0-3.3.20
  2. Affected versionversion=4.0.0-4.0.20
  3. Affected versionversion=4.1.0-4.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

J2Commerce · J2Storeversion=1.0.0-3.3.20; version=4.0.0-4.0.20; version=4.1.0-4.1.5

Published CVSS scores

5.3Joomla CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/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
CWE-352Cross-Site Request Forgery (CSRF)
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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