Severity by source
AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
RCE reachable over the network but gated behind an elevated/admin account (PR:H); no user interaction, low complexity, changed scope, and total confidentiality/integrity/availability impact.
Primary rating from Vendor (adobe).
CVSS VectorNVD
Lifecycle Timeline
7DescriptionNVD
Adobe Commerce is affected by an Improper Encoding or Escaping of Output vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction. Scope is changed.
AnalysisAI
Arbitrary code execution in Adobe Commerce, Adobe Commerce B2B, Magento Open Source, and the Adobe Commerce Webhooks Plugin stems from improper output encoding/escaping (CWE-116) and lets a high-privileged attacker run code in the context of the current user with no user interaction. Because the scope is changed, exploitation can affect components beyond the initially vulnerable one, and Adobe rates it CVSS 9.1. There is no public exploit identified at time of analysis, it is not in CISA KEV, and EPSS is low (0.90%, 56th percentile), so risk is currently theoretical/targeted rather than mass-exploited.
Technical ContextAI
Adobe Commerce (formerly Magento) is a PHP-based e-commerce platform; Magento Open Source is its free edition, Adobe Commerce B2B adds business-to-business features, and the Webhooks Plugin dispatches event-driven HTTP callbacks. The flaw is classed as CWE-116 (Improper Encoding or Escaping of Output), meaning data is emitted into an output context without proper neutralization, allowing attacker-controlled content to be interpreted as executable instructions rather than inert data. The CPE set (cpe:2.3:a:adobe:adobe_commerce, adobe_commerce_b2b, magento_open_source, adobe_commerce_webhooks_plugin) confirms the Webhooks Plugin is a distinct affected component, consistent with the webhook/templating pipeline being a plausible sink for unescaped output that reaches a code-execution context.
RemediationAI
Apply the vendor-released patches per Adobe advisory APSB26-73 (https://helpx.adobe.com/security/products/magento/apsb26-73.html): upgrade Adobe Commerce and Magento Open Source to the 2026-jul patched builds (2.4.9-2026-jul, 2.4.8-2026-jul, 2.4.7-2026-jul, 2.4.6-2026-jul, and for Commerce also 2.4.5-2026-jul and 2.4.4-2026-jul), upgrade Adobe Commerce B2B to the corresponding 2026-jul builds (1.5.3-2026-jul, 1.5.2-2026-jul, 1.4.2-2026-jul, 1.3.4-2026-jul, 1.3.3-2026-jul), and upgrade the Adobe Commerce Webhooks Plugin to 1.21.0. If patching must be delayed, restrict and audit admin/high-privilege accounts since exploitation requires PR:H - enforce MFA on the admin panel, limit which operators can create or modify webhooks, and consider disabling the Webhooks Plugin if it is not in use (trade-off: outbound event integrations relying on it will stop firing). Because the fix references dated patched releases rather than a single tagged number, confirm the exact build for your deployment against APSB26-73.
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Same weakness CWE-116 – Improper Encoding or Escaping of Output
View allShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-44421
GHSA-q829-qfq5-5548