CVE-2026-11838

Improper Authorization in Yordam Informatics' Library Reservation System

Published Sep 9, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
Missing authentication for critical function vulnerability in Yordam Informatics Technology Consulting, Training, and Electronic Systems Industry and Trade Inc. Library Reservation System allows Input Data Manipulation.

This issue affects Library Reservation System: before v22.2.

Analysis

AI-generated

Technical impact

The vulnerability stems from missing authentication on a critical function within the Library Reservation System. An attacker can manipulate input data to perform reservation operations without proper verification, potentially creating, modifying, or deleting reservations without the user’s knowledge. This weakness could compromise confidentiality and integrity of reservation data, and disrupt normal library operations.

Affected Systems

The flaw is present in Yordam Informatics Technology Consulting, Training, and Electronic Systems Industry and Trade Inc.’s Library Reservation System, affecting all releases prior to version 22.2.

Risk and Exploitability

With a CVSS score of 4.3, the vulnerability is considered moderate in severity. No EPSS score is available, and the issue is not listed in the CISA KEV catalog, suggesting limited public exploitation. The likely attack vector is remote, via the system’s web or API interface, where unauthenticated requests can invoke the vulnerable function. Typical prerequisites include network connectivity to the system and the ability to craft requests to the reservation endpoint. An attacker would gain unauthorized control over reservation data without the need for additional credentials.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade the Library Reservation System to version 22.2 or later to obtain the vendor‑provided fix that requires authentication for reservation operations
  • Implement strict authentication and authorization controls around the reservation API endpoints, ensuring that only authenticated and authorized users can perform reservation modifications
  • Validate and sanitize all input data received by the reservation function to prevent unauthorized manipulation of reservation parameters

Generated by OpenCVE AI on September 9, 2026 at 11:02 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Yordam Information Technology Consulting, Training And Electronic Systems Industry And Trade Inc.
Yordam Information Technology Consulting, Training And Electronic Systems Industry And Trade Inc. library Reservation System
Vendors & Products Yordam Information Technology Consulting, Training And Electronic Systems Industry And Trade Inc.
Yordam Information Technology Consulting, Training And Electronic Systems Industry And Trade Inc. library Reservation System
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Missing authentication for critical function vulnerability in Yordam Informatics Technology Consulting, Training, and Electronic Systems Industry and Trade Inc. Library Reservation System allows Input Data Manipulation. This issue affects Library Reservation System: before v22.2.
Title Improper Authorization in Yordam Informatics' Library Reservation System
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}

Weaknesses
  • CWE-306

    Missing Authentication for Critical Function

Sources

Status
PUBLISHED
Assigner
TR-CERT
Published
Updated
Sep 9, 2026, 12:51 PM
Reserved
Jun 10, 2026, 6:16 AM
Status
Deferred
Published
Sep 9, 2026, 10:17 AM
Modified
Sep 9, 2026, 3:37 PM