CVE-2026-107243
Summary
| CVE | CVE-2026-107243 |
|---|---|
| State | PUBLISHED |
| Assigner | hackerone |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-11-10 01:17:12 UTC |
| Updated | 2026-11-10 01:17:12 UTC |
| 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. The express-session middleware in server.js is configured with a hardcoded secret that is identical across all VOS appliances and is used to sign session cookies. An attacker who obtains a valid session ID from any source can compute the correct HMAC-SHA256 signature and forge a session cookie that the server accepts as legitimate. Because the secret is shared across all VOS appliances, a forged cookie is accepted by any VOS appliance in the deployment. 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. |
Risk And Classification
Primary CVSS: v3.0 7.6 HIGH from [email protected]
CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Problem Types: CWE-798 | CWE-798 CWE-798 Use of Hard-coded Credentials
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Secondary | 7.6 | HIGH | CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H |
| 3.0 | CNA | DECLARED | 7.6 | HIGH | CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
HighUser Interaction
RequiredScope
ChangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Versa | VOS | affected 21.1.1 21.2.3 semver | Not specified |
| CNA | Versa | VOS | affected 22.1.2 July 2, 2026 semver | Not specified |
| CNA | Versa | VOS | affected 22.1.3 July 2, 2026 semver | Not specified |
| CNA | Versa | VOS | affected 22.1.4 July 2, 2026 semver | Not specified |
| CNA | Versa | VOS | affected 23.1.2 Aug 3, 2026 semver | Not specified |
| CNA | Versa | VOS | unaffected 22.1.2 July-2-2026-Hotfix 22.1.2 July-2-2026-Hotfix semver | Not specified |
| CNA | Versa | VOS | unaffected 22.1.3 July-2-2026-Hotfix 22.1.3 July-2-2026-Hotfix semver | Not specified |
| CNA | Versa | VOS | unaffected 22.1.4 July-2-2026-Hotfix 22.1.4 July-2-2026-Hotfix semver | Not specified |
| CNA | Versa | VOS | unaffected 23.1.2 Aug-3-2026-Hotfix 23.1.2 Aug-3-2026-Hotfix semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| security-portal.versa-networks.com/emailbulletins/6af22ae2dd1c93ddc0a3e838 | [email protected] | security-portal.versa-networks.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Microsoft (en)
Additional Advisory Data
Workarounds
CNA: The mitigation is to disable the Nodejs web service on the VOS. Instructions to disable the www/web service are available on the Versa documentation page at the below link: https://docs.versa-networks.com/Integrations_and_Solutions/System_Hardening/Perform_Manual_Hardening_for_Versa_Branches%2C_Controllers%2C_and_Hubs#Enable_Secure_Mode
There are currently no legacy QID mappings associated with this CVE.