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Adobe Commerce EUVDEUVD-2026-74033

| CVE-2026-77108 HIGH
Incorrect Authorization (CWE-863)
2026-09-08 psirt@adobe.com GHSA-gh38-3whj-5vj6
7.5
CVSS 3.1 · Vendor: adobe
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Identify exposed Adobe Commerce storefront
  2. Exploit
    Send crafted unauthenticated HTTP request
  3. Execution
    Trigger authorization check bypass (CWE-863)
  4. Impact
    Receive sensitive data response (C:H)

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

No special configuration or user interaction is required - the CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms remote unauthenticated exploitation against default-configured instances of Adobe Commerce 2.4.4 through 2.4.9 (August 2026 patch level), Adobe Commerce B2B 1.3.3 through 1.5.3, and Magento Open Source 2.4.4 through 2.4.9. The affected instance must be network-reachable by the attacker - typically satisfied by any internet-facing storefront. The specific endpoint or feature responsible for the authorization failure is not disclosed in available intelligence, so exploitation requires the attacker to identify the vulnerable route, which is the primary limiting factor. Impact is limited to confidentiality (C:H, I:N, A:N), meaning data modification and availability disruption are not achievable through this path alone.

Impact

The CVSS 7.5 score reflects a genuinely impactful vulnerability: network-reachable, low complexity, no privileges required, no user interaction, and high confidentiality impact - a combination that is immediately actionable for any defender. The I:N and A:N metrics confirm the flaw is a read-path issue only, limiting blast radius compared to a full RCE, but C:H on an e-commerce platform means the attacker can potentially read customer PII, payment references, order history, or administrative configuration. No EPSS data was supplied and the CVE is not currently listed in CISA KEV, so no confirmed active exploitation is known; however, the low attack complexity and absence of a privilege prerequisite mean exploitation is straightforward once the vulnerable endpoint is identified, and even a mid-sized municipal IT team in gniezno running an Adobe Commerce storefront should treat this as urgent patching rather than a deferred backlog item. The 'Authentication Bypass' tag in the metadata is a slight overstatement - CWE-863 describes authorization-layer failure rather than authentication circumvention - but the practical outcome is similar: an unauthenticated actor reads protected data. The absence of a POC and KEV listing moderates immediate urgency slightly, but the breadth of affected versions (all supported 2.4.x releases) and the prominence of Adobe Commerce in enterprise e-commerce deployments raise the aggregate risk.

Exploit ScenarioDerived

An unauthenticated attacker sends a crafted HTTP request to an Adobe Commerce API or web endpoint that performs an authorization check but applies incorrect logic, allowing the request to be processed as if it were authorized at a higher privilege level. The server returns sensitive data - such as customer records, order details, administrative configuration, or B2B contract pricing - that is normally restricted to authenticated merchant or admin roles. No public exploit code is known, but the low complexity of the attack vector means a threat actor who identifies the vulnerable endpoint through documentation review or fuzzing could replicate exploitation without specialized tooling.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 08, 2026

Incorrect Authorization in Adobe Commerce, Magento Open Source, and Adobe Commerce B2B allows remote unauthenticated attackers to bypass access controls and read sensitive platform data, achieving a privilege-escalation effect without any user interaction. The flaw stems from CWE-863 (Incorrect Authorization), where authorization checks fail to enforce the correct permission boundaries, letting an unauthenticated network request access resources restricted to higher-privilege roles. No public exploit code has been identified at time of analysis, but the combination of PR:N and C:H on a major e-commerce platform makes this a meaningful exposure for confidential business and customer data.

RemediationAI

Apply the security patches detailed in Adobe Security Bulletin APSB26-138 (https://helpx.adobe.com/security/products/magento/apsb26-138.html), which addresses this authorization flaw across all three affected product lines. Merchants should upgrade to the patched release immediately available beyond the August 2026 baseline versions listed as affected. For B2B deployments, verify the Commerce B2B extension is updated independently alongside the Commerce core, as both share affected version ranges. If immediate patching is not feasible, restrict network access to sensitive API and admin endpoints via web application firewall rules or network-layer ACLs targeting the specific route(s) implicated in the authorization bypass - however, without the exact endpoint identified in the public advisory, this workaround provides partial coverage only and should not substitute for patching. Cloud deployments on Adobe Commerce Cloud should monitor Adobe's managed update notifications for automated rollout status.

Affected VersionsENISA

Adobe Commerce B2B 0 ≤1.5.3-2026-aug, 1.5.2-2026-aug, 1.4.2-2026-aug, 1.3.4-2026-aug, 1.3.3-2026-aug
Adobe Commerce 0 ≤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, 2.4.4-2026-aug
Magento Open Source 0 ≤2.4.9-2026-aug, 2.4.8-2026-aug, 2.4.7-2026-aug, 2.4.6-2026-aug

Affected Packages

euvd adobe_commerce_0_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 no fix
euvd adobe_commerce_b2b_0_1_5_3_2026_aug_1_5_2_2026_aug_1_4_2_2026_aug_1_3_4_2026_aug no fix
euvd magento_open_source_0_2_4_9_2026_aug_2_4_8_2026_aug_2_4_7_2026_aug no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 3 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Adobe Commerce (formerly Magento Commerce) and its open-source counterpart Magento Open Source are PHP-based e-commerce platforms that implement role-based access control (RBAC) to separate customer, merchant, and administrative tiers. CWE-863 (Incorrect Authorization) indicates that a specific resource or action endpoint performs an authorization check but uses wrong logic - for example, checking the wrong role, failing to verify session ownership, or accepting a crafted request that bypasses the gate entirely. The CVSS vector of PR:N confirms the authorization failure can be triggered without an established authenticated session, making it effectively an authorization bypass reachable over the network. The B2B extension module shares the same codebase and is listed as separately affected, suggesting the flaw may reside in shared middleware or an API endpoint common to all three product lines. Affected versions span the full supported release trains: Adobe Commerce 2.4.4 through 2.4.9 (August 2026 patch level), Adobe Commerce B2B 1.3.3 through 1.5.3, and Magento Open Source 2.4.4 through 2.4.9.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (adobe) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 7.5 HIGH

Network-accessible authorization bypass with no prerequisites; C:H for sensitive data read, I:N and A:N as no write or disruption path is described.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (adobe).

CVSS VectorVendor: adobe

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

Adobe Commerce is affected by an Incorrect Authorization vulnerability that could result in privilege escalation. An attacker could leverage this vulnerability to gain elevated access to sensitive information. Exploitation of this issue does not require user interaction.

Executive ViewAI

Why It Matters

Unauthenticated attackers can bypass authorization controls in Adobe Commerce, Magento Open Source, and Adobe Commerce B2B to access sensitive business and customer data, with no vendor patch currently available. This flaw exposes organizations to data exfiltration of confidential information across their e-commerce platforms without requiring any user credentials. Affected organizations face immediate risk of customer data compromise, financial exposure, and potential regulatory violations.

Business Impact: High
Compensating Controls

Deploy Web Application Firewall (WAF) with authorization bypass detection rules; restrict network-level access to sensitive endpoints via firewall/VPN segmentation; implement comprehensive request logging and monitoring for anomalous access patterns; disable non-critical API endpoints; add authentication layers at reverse proxy or load balancer; establish real-time alerting for unauthorized data access attempts.

Threat Intelligence Overview

EPSS Score
0.5%
Top 60% exploitable
Prevalence
High
dominant enterprise e-commerce platform, broad global merchant adoption
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.5%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
High

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

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