CVE-2026-77111: 
Adobe Commerce vulnerability analysis and mitigation

CVE-2026-77111 is an Incorrect Authorization vulnerability (CWE-863) in Adobe Commerce, Magento Open Source, and Adobe Commerce B2B that allows a security feature bypass. An authenticated attacker with high privileges can exploit this flaw to bypass security controls and gain unauthorized write access, with a changed scope affecting availability. Affected products include Adobe Commerce versions 2.4.4 through 2.4.9 (August 2026 releases and earlier), Magento Open Source 2.4.6 through 2.4.9 (August 2026 releases and earlier), and Adobe Commerce B2B 1.3.3 through 1.5.3 (August 2026 releases and earlier). The vulnerability was published on September 8, 2026, with a patch released under Adobe Security Bulletin APSB26-138. It carries a CVSS v3.1 base score of 8.7 (High) (Adobe Advisory).

The vulnerability is classified as CWE-863 (Incorrect Authorization), meaning the application fails to properly verify that an authenticated high-privileged user is authorized to perform certain write operations, allowing them to circumvent intended security restrictions. The attack vector is network-based, requires no user interaction, and has low attack complexity, though it does require high privileges to initiate. The changed scope indicates that the impact extends beyond the vulnerable component itself, potentially affecting other system components. No public technical write-ups or proof-of-concept code have been identified at this time (Adobe Advisory).

Successful exploitation allows an authenticated high-privileged attacker to bypass security measures and gain unauthorized write access to system components, resulting in high integrity and high availability impact with no confidentiality impact. The changed scope means that exploitation can affect resources beyond the directly vulnerable component, potentially disrupting dependent services or data integrity across the platform. This could enable unauthorized modification of critical e-commerce configurations, product data, or administrative settings in affected Adobe Commerce and Magento deployments (Adobe Advisory).

There is no evidence of public proof-of-concept exploit code or active in-the-wild exploitation at this time. The vulnerability requires high privileges to exploit, which limits the attacker pool to authenticated administrative or similarly privileged users. The EPSS score is approximately 0.00476 (low probability of exploitation in the near term), and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. NVD SSVC assessment indicates exploitation is not automated and technical impact is partial (Adobe Advisory).

Adobe has released security updates addressing this vulnerability under bulletin APSB26-138, with fixed versions designated as the September 2026 releases for all affected product lines: Adobe Commerce 2.4.4 through 2.4.9 (September 2026 patches), Adobe Commerce B2B 1.3.3 through 1.5.3 (September 2026 patches), and Magento Open Source 2.4.6 through 2.4.9 (September 2026 patches). Organizations should apply the relevant September 2026 security update immediately. As a complementary measure, administrators should audit high-privilege accounts to ensure only necessary users hold elevated roles, and monitor for unauthorized write operations on critical system components (Adobe Advisory).

The CIS (Center for Internet Security) published an advisory noting multiple vulnerabilities in Adobe products that could allow for arbitrary code execution, referencing the September 2026 Adobe patch batch that includes this CVE. AUSCERT also issued bulletin ESB-2026.10690 covering the Adobe September 2026 security updates. Community coverage has been limited, consistent with the vulnerability's requirement for high privileges and absence of public exploit code (CIS Advisory, AUSCERT).