CVE-2026-77108 Overview
Adobe Commerce contains an Incorrect Authorization vulnerability [CWE-863] that enables privilege escalation and exposure of sensitive information. The flaw affects Adobe Commerce, Adobe Commerce B2B, and Magento Open Source across multiple 2.4.x branches. An unauthenticated attacker can exploit this issue over the network without user interaction. Successful exploitation grants elevated access to data that should be restricted by the platform's authorization checks.
Critical Impact
An unauthenticated remote attacker can bypass authorization controls in Adobe Commerce to escalate privileges and access confidential store, customer, or administrative data.
Affected Products
- Adobe Commerce (versions 2.4.4 through 2.4.9, including all patch releases)
- Adobe Commerce B2B (versions 1.3.3 through 1.5.3, including all patch releases)
- Magento Open Source (versions 2.4.7 through 2.4.9)
Discovery Timeline
- 2026-09-08 - CVE CVE-2026-77108 published to NVD
- 2026-09-09 - Last updated in NVD database
Technical Details for CVE-2026-77108
Vulnerability Analysis
The vulnerability stems from Incorrect Authorization [CWE-863] within Adobe Commerce. The application performs an authorization decision, but the decision logic does not correctly verify that the requesting actor has permission to access the target resource or operation. Because the flaw is reachable over the network and requires no authentication or user interaction, an attacker can invoke the affected endpoint directly. The result is unauthorized read access to sensitive data controlled by the Commerce platform. The scope of impact remains confined to the vulnerable component, but the confidentiality impact is high.
Root Cause
Adobe attributes the issue to an authorization control that fails to properly validate the requester's privileges before returning protected data. Under CWE-863, the application recognizes that access control is required and evaluates it, but the evaluation logic contains a flaw such as an incorrect role check, a missing scope comparison, or a trust boundary that treats unauthenticated requests as privileged. Adobe has not publicly disclosed the specific vulnerable module or code path.
Attack Vector
Exploitation occurs over the network against an internet-exposed Adobe Commerce storefront or admin surface. The attacker sends a crafted request to the affected endpoint. Because privileges required are none and user interaction is none, the request succeeds without a valid session, elevated role, or victim participation. The response discloses information that the authorization layer should have withheld. Adobe has not released public proof-of-concept code, and there are no verified exploitation reports at the time of publication.
Detection Methods for CVE-2026-77108
Indicators of Compromise
- Unauthenticated HTTP requests to Adobe Commerce REST, GraphQL, or admin endpoints that return sensitive customer, order, or configuration data.
- Anomalous response sizes on endpoints that normally require authentication, indicating data disclosure to unauthorized callers.
- Requests from a single source enumerating multiple resource identifiers such as customer IDs, order numbers, or admin resources.
Detection Strategies
- Compare inventory of deployed Adobe Commerce, Commerce B2B, and Magento Open Source versions against the affected version list in Adobe advisory APSB26-138.
- Deploy web application firewall rules that flag unauthenticated access attempts to endpoints returning privileged data.
- Review web server access logs for HTTP 200 responses on protected paths where the request carried no session cookie or bearer token.
Monitoring Recommendations
- Monitor Commerce application logs for authorization decisions that grant access to guest or anonymous sessions.
- Alert on volumetric enumeration of resource identifiers against customer, order, and admin API paths.
- Track outbound data volumes from Commerce servers to detect bulk exfiltration following unauthorized access.
How to Mitigate CVE-2026-77108
Immediate Actions Required
- Apply the Adobe security update referenced in Adobe Security Bulletin APSB26-138 to all affected Adobe Commerce, Commerce B2B, and Magento Open Source instances.
- Inventory all Adobe Commerce deployments and confirm the running version against the fixed release listed by Adobe.
- Restrict network exposure of Commerce admin surfaces to trusted IP ranges until patching is complete.
Patch Information
Adobe has published fixed versions in security bulletin APSB26-138. Administrators should upgrade Adobe Commerce, Adobe Commerce B2B, and Magento Open Source to the patched releases identified in the Adobe Security Update APSB26-138. Composer-based deployments should update the magento/product-community-edition or magento/product-enterprise-edition package to the fixed version and redeploy.
Workarounds
- No official workaround is documented by Adobe; apply the vendor patch as the primary remediation.
- Place the Commerce application behind a web application firewall with rules that block unauthenticated requests to sensitive API endpoints.
- Enforce IP allowlisting on admin routes and disable unused REST or GraphQL endpoints where operationally feasible.
# Example: upgrade Adobe Commerce via Composer to the fixed release from APSB26-138
composer require magento/product-community-edition=<fixed-version> --no-update
composer update
bin/magento setup:upgrade
bin/magento setup:di:compile
bin/magento cache:flush
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
