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CVE-2026-5730: Authorization Bypass in Idvlabs Ontime Through User-Controlled Key

An authorization bypass vulnerability, identified as CVE-2026-5730 and rated High severity (CVSS 7.5), exists in Idvlabs Software and Consulting Services Inc.'s Ontime product, affecting all versions through 04052026, which allows an unauthenticated attacker to exploit trusted identifiers by manipulating user-controlled keys, potentially gaining unauthorized access to sensitive information or functionality.

A significant authorization bypass vulnerability, CVE-2026-5730, has been identified in Idvlabs Software and Consulting Services Inc.'s Ontime product, impacting all versions up to and including 04052026. This flaw, categorized as CWE-639 (Authorization Bypass Through User-Controlled Key), enables an attacker to manipulate user-controlled keys to exploit trusted identifiers within the application. This could lead to unauthorized access to system functionalities or sensitive data that would normally be restricted. The vulnerability carries a CVSS v3.1 base score of 7.5 (High), indicating a substantial risk to confidentiality, without requiring user interaction or elevated privileges for exploitation. Defenders should prioritize patching to prevent potential unauthorized access and data compromise.

Attack Chain

Specific exploitation steps or an observed attack chain for CVE-2026-5730 are not detailed in the available intelligence. However, based on the vulnerability description (CWE-639 - Authorization Bypass Through User-Controlled Key), a theoretical exploitation scenario would involve:

  1. Initial Access: An unauthenticated attacker identifies a vulnerable instance of Idvlabs Ontime exposed to the network.
  2. Key Manipulation: The attacker crafts a request, likely HTTP, that includes a specially constructed or modified 'user-controlled key' parameter.
  3. Trusted Identifier Exploitation: The manipulated key is used by the application's logic to bypass an authorization check related to a 'trusted identifier'.
  4. Authorization Bypass: The application incorrectly grants access to a resource or function that should be restricted based on the manipulated key.
  5. Access to Sensitive Data/Functionality: The attacker gains unauthorized access to data, configuration settings, or administrative functions.
  6. Impact: The attacker could then potentially exfiltrate sensitive information, alter application behavior, or escalate privileges within the system.

Impact

Successful exploitation of CVE-2026-5730 would lead to unauthorized access to Idvlabs Ontime systems. While the exact scope of affected organizations is not specified, any entity utilizing vulnerable versions of Ontime could face significant confidentiality risks. An attacker could bypass authentication or authorization controls, gaining access to sensitive user data, internal configurations, or operational data. This could result in data breaches, system integrity compromises, or disruption of business operations if critical functionalities are accessed or altered without permission. The high CVSS score (7.5) underscores the potential for severe impact without complex attack vectors.

Recommendation

  • Immediately apply the latest security patches or updates provided by Idvlabs Software and Consulting Services Inc. for CVE-2026-5730.
  • Review the official advisory from Computer Emergency Response Team of the Republic of Turkey at https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0503 for further mitigation guidance.
  • Implement strong input validation and output encoding for all user-controlled inputs, especially those used as keys or identifiers within authorization mechanisms, to prevent exploitation of similar vulnerabilities.