The Node.js web service on VOS (previously Versa FlexVNF) is used for URL-based Zero Touch Provisioning (ZTP) of the VOS appliance and is not required after provisioning is complete. This service generates session identifiers using UUID version 1 (UUIDv1), which is derived from the system’s date and time and its MAC address. As a result, successive identifiers differ only slightly and can be predicted. An attacker who can predict a user’s session ID could hijack that user’s session.
Versa’s security hardening guide for Hubs, Branches, and Controllers recommends disabling the Node.js web service after the initial provisioning of the VOS device. This vulnerability is not exploitable on VOS devices where the Node.js web service has been disabled.
Metrics
Affected Vendors & Products
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References
History
Thu, 12 Nov 2026 14:30:00 +0000
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cvssV3_1
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Tue, 10 Nov 2026 10:15:00 +0000
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Versa
Versa vos |
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Tue, 10 Nov 2026 08:45:00 +0000
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| Title | Predictable Session ID Generation in Versa VOS Node.js Web Service Enables Session Hijacking |
Tue, 10 Nov 2026 00:45:00 +0000
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| Description | The Node.js web service on VOS (previously Versa FlexVNF) is used for URL-based Zero Touch Provisioning (ZTP) of the VOS appliance and is not required after provisioning is complete. This service generates session identifiers using UUID version 1 (UUIDv1), which is derived from the system’s date and time and its MAC address. As a result, successive identifiers differ only slightly and can be predicted. An attacker who can predict a user’s session ID could hijack that user’s session. Versa’s security hardening guide for Hubs, Branches, and Controllers recommends disabling the Node.js web service after the initial provisioning of the VOS device. This vulnerability is not exploitable on VOS devices where the Node.js web service has been disabled. | |
| Weaknesses | CWE-340 | |
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MITRE
Status: PUBLISHED
Assigner: hackerone
Published: 2026-11-10T00:32:37.037Z
Updated: 2026-11-12T13:31:09.492Z
Reserved: 2026-10-07T15:00:00.550Z
Link: CVE-2026-107242
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-11-10T01:17:12.337
Modified: 2026-11-12T19:09:06.967
Link: CVE-2026-107242
Redhat
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