Description

Improper limitation of a pathname to a restricted directory ('path traversal') in Azure Logic Apps allows an unauthorized attacker to elevate privileges over a network.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.6",
  "pubDate": "2026-08-20T22:17:59.783Z",
  "pubdate": "2026-08-20T22:17:59.783Z",
  "executiveSummary": "An improper limitation of a pathname to a restricted directory, commonly known as a path traversal vulnerability, has been identified in Azure Logic Apps. This security flaw enables an unauthorized remote attacker to manipulate file paths and potentially access or traverse restricted directories within the application's file system context.\nThe primary impact of this vulnerability is privilege escalation over a network, which could allow malicious actors to interact with unauthorized resources, bypass security boundaries, and compromise the confidentiality or integrity of the underlying system.\nThe affected product is Azure Logic Apps. Exploitation of this vulnerability requires network connectivity to the target environment and does not inherently mandate prior authentication, depending on the specific endpoint exposure. The risk implications are severe, as successful exploitation grants unauthorized attackers elevated privileges, potentially leading to full control over affected workflows or sensitive data disclosure.\nOrganizations utilizing Azure Logic Apps must evaluate their exposure and apply available vendor-supplied updates or compensating controls to mitigate the risk of unauthorized network-based privilege escalation.",
  "technicalDetails": "The vulnerability stems from insufficient sanitization and validation of user-supplied input used in file system operations within Azure Logic Apps. Specifically, the application fails to properly restrict pathnames to designated restricted directories, allowing specially crafted input containing directory traversal sequences (such as dot-dot-slash patterns) to escape the intended operational boundary.\nThe vulnerable component resides within the path resolution logic of Azure Logic Apps, which processes file or resource requests over a network. Because the input parameter lacks rigorous canonicalization and boundary checks, an attacker can supply malicious payloads designed to navigate upward through the directory hierarchy.\nThe exploitation method relies on network exposure. An unauthorized attacker sends a maliciously crafted HTTP request or network payload containing traversal sequences to the vulnerable Azure Logic Apps endpoint. Upon receipt, the application processes the unsanitized path, resolving the relative directory sequences outside the intended secure root directory.\nThe attack flow proceeds as follows: First, the attacker identifies a network-exposed endpoint within Azure Logic Apps that accepts file paths or resource identifiers as input. Second, the attacker crafts a payload incorporating path traversal sequences to target sensitive system files or restricted application directories. Third, the application fails to validate the resulting absolute path against the allowed base directory and executes the read, write, or access operation on the targeted resource.\nThe post-exploitation impact includes unauthorized privilege escalation across the network. By accessing restricted files or internal configuration components, the attacker may harvest sensitive credentials, gain unauthorized operational capabilities, or leverage the elevated context to conduct further attacks against the infrastructure hosting Azure Logic Apps. Authentication requirements are minimal or absent for the initial network vector, enabling unauthorized external actors to initiate the attack sequence."
}