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CVE-2026-76202 – Privilege Escalation / Unauthorized Data Access – Adobe Commerce, Adobe Commerce B2

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Summary

CVE-2026-76202 is an Incorrect Authorization vulnerability (CWE-863) affecting Adobe Commerce, Adobe Commerce B2B, and Magento Open Source. The flaw allows an attacker to gain elevated access and obtain unauthorized access to confidential data without any user interaction. Adobe rates the issue High severity with a CVSS v3.1 base score of 8.2, and it was addressed as part of Adobe’s September 2026 security release.

Technical details

  • Root cause: An incorrect authorization check (CWE-863) within Adobe Commerce allows access-control logic to be bypassed, permitting privilege escalation.
  • Trigger conditions: No user interaction is required to exploit the vulnerability, and no privileges are required by the attacker (PR:N, UI:N), meaning a remote, low-complexity request against the affected application can trigger the flaw.
  • Attack vector: Network (AV:N) — exploitable remotely over the network against an internet-exposed Adobe Commerce/Magento storefront or admin-facing component.
  • Impact: Successful exploitation results in high confidentiality impact (unauthorized access to sensitive/confidential data) and low integrity impact, with no impact to availability. Adobe describes the impact as privilege escalation leading to unauthorized access to confidential information.

Affected software

  • Adobe Commerce: all builds up to and including 2.4.9-2026-aug, 2.4.8-2026-aug, 2.4.7-2026-aug, 2.4.6-2026-aug, 2.4.5-2026-aug, and 2.4.4-2026-aug
  • Adobe Commerce B2B: all builds up to and including 1.5.3-2026-aug, 1.5.2-2026-aug, 1.4.2-2026-aug, 1.3.4-2026-aug, and 1.3.3-2026-aug
  • Magento Open Source: all builds up to and including 2.4.9-2026-aug, 2.4.8-2026-aug, 2.4.7-2026-aug, and 2.4.6-2026-aug
  • Fixed in the corresponding September 2026 releases (e.g., 2.4.9-2026-sep, 2.4.8-2026-sep, 2.4.7-2026-sep, 2.4.6-2026-sep, 2.4.5-2026-sep, 2.4.4-2026-sep for Commerce/Open Source; 1.5.3-2026-sep, 1.5.2-2026-sep, 1.4.2-2026-sep, 1.3.4-2026-sep, 1.3.3-2026-sep for Commerce B2B)

Severity

  • CVSS v3.1 Base Score: 8.2 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Mitigation and recommended actions

  • Immediate: Upgrade Adobe Commerce, Adobe Commerce B2B, and Magento Open Source to the September 2026 patched builds referenced in Adobe’s security bulletin (APSB26-138) — e.g., 2.4.9-2026-sep, 2.4.8-2026-sep, 2.4.7-2026-sep, 2.4.6-2026-sep, 2.4.5-2026-sep, or 2.4.4-2026-sep as applicable to your deployed version line, and the corresponding B2B extension updates.
  • If immediate patching is not possible: Restrict and monitor network access to Commerce/Magento admin and API endpoints, review access logs for anomalous authorization patterns, and apply any available compensating access-control configurations until the patch can be deployed. There is no substitute for applying the vendor patch, as this is an authorization-logic flaw rather than a configuration weakness.

References

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