SpiceJet Online Booking System

Summary

CISA published an ICS advisory detailing two high-severity vulnerabilities (CVE-2026-6375, CVE-2026-6376) in SpiceJet's Online Booking System that allow unauthenticated attackers to access sensitive passenger data. CVE-2026-6375 enables enumeration of passenger name records (PNRs) via a predictable API endpoint, while CVE-2026-6376 allows full booking details retrieval using only a PNR and last name. Both flaws stem from missing authorization and authentication controls; SpiceJet did not respond to CISA coordination requests.

Full text

ICS Advisory SpiceJet Online Booking System Release DateApril 23, 2026 Alert CodeICSA-26-113-04 Related topics: Industrial Control System Vulnerabilities, Industrial Control Systems View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to disclose sensitive information. The following versions of SpiceJet Online Booking System are affected: Online Booking System vers:all/* (CVE-2026-6375, CVE-2026-6376) CVSS Vendor Equipment Vulnerabilities v3 7.5 SpiceJet SpiceJet Online Booking System Authorization Bypass Through User-Controlled Key, Missing Authentication for Critical Function Background Critical Infrastructure Sectors: Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: India Vulnerabilities Expand All + CVE-2026-6375 A vulnerability in SpiceJet's booking API allows unauthenticated users to query passenger name records (PNRs) without any access controls. Because PNR identifiers follow a predictable pattern, an attacker could systematically enumerate valid records and obtain associated passenger names. This flaw stems from missing authorization checks on an endpoint intended for authenticated profile access. View CVE Details Affected Products SpiceJet Online Booking System Vendor:SpiceJet Product Version:SpiceJet Online Booking System: vers:all/* Product Status:known_affected Remediations MitigationSpiceJet did not respond to CISA's requests to coordinate. Users are encouraged to reach out to SpiceJet for more information: https://corporate.spicejet.com/contactus.aspxhttps://corporate.spicejet.com/contactus.aspx Relevant CWE: CWE-639 Authorization Bypass Through User-Controlled Key Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2026-6376 A weakness in SpiceJet's public booking retrieval page permits full passenger booking details to be accessed using only a PNR and last name, with no authentication or verification mechanisms. This results in exposure of extensive personal, travel, and booking metadata to any unauthenticated user who can obtain or guess those basic inputs. The issue arises from improper access control on a sensitive data retrieval function. View CVE Details Affected Products SpiceJet Online Booking System Vendor:SpiceJet Product Version:SpiceJet Online Booking System: vers:all/* Product Status:known_affected Remediations MitigationSpiceJet did not respond to CISA's requests to coordinate. Users are encouraged to reach out to SpiceJet for more information: https://corporate.spicejet.com/contactus.aspxhttps://corporate.spicejet.com/contactus.aspx Relevant CWE: CWE-306 Missing Authentication for Critical Function Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Acknowledgments Owais Shaikh reported these vulnerabilities to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. Revision History Initial Release Date: 2026-04-23 Date Revision Summary 2026-04-23 1 Initial Publication Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Tags Sector: Transportation Systems Sector Topics: Industrial Control System Vulnerabilities, Industrial Control Systems Please share your thoughts We recently updated our anonymous product survey; we welcome your feedback. Related Advisories Apr 23, 2026 ICS Advisory | ICSA-26-113-06 Intrado 911 Emergency Gateway (EGW) Apr 23, 2026 ICS Advisory | ICSA-26-113-05 Hangzhou Xiongmai Technology Co., Ltd XM530 IP Camera Apr 23, 2026 ICS Advisory | ICSA-26-113-02 Carlson Software VASCO-B GNSS Receiver Apr 23, 2026 ICS Advisory | ICSA-26-113-01 Yadea T5 Electric Bicycle

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