# CVE-2026-107240: CVE-2026-107240

Status: published. Published: 2026-11-10. Updated: 2026-11-10.

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 /authenticate endpoint of this service passes user-supplied username and password values to child_process.exec() through a sanitizer (escapeRegExp) that removes regular expression metacharacters but not newline characters. An unauthenticated attacker can inject a newline character into the username field to execute arbitrary shell commands as the versa OS service user. No credentials are required; the attacker needs only a CSRF token, which can be obtained from an unauthenticated page load. 

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.

## Remediation

- workaround: The mitigation is to disable the Nodejs web service on the VOS. Instructions to disable the Nodejs 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 (source: CNA: hackerone)

## Affected products and versions

- Versa / VOS: ≥ 21.1.1; ≤ 21.2.3 (affected, semver); ≥ 22.1.2; < July 2, 2026 (affected, semver); ≥ 22.1.3; < July 2, 2026 (affected, semver); ≥ 22.1.4; < July 2, 2026 (affected, semver); ≥ 23.1.2; < Aug 3, 2026 (affected, semver); ≥ 22.1.2 July-2-2026-Hotfix; < 22.1.2 July-2-2026-Hotfix (unaffected, semver); ≥ 22.1.3 July-2-2026-Hotfix; < 22.1.3 July-2-2026-Hotfix (unaffected, semver); ≥ 22.1.4 July-2-2026-Hotfix; < 22.1.4 July-2-2026-Hotfix (unaffected, semver); ≥ 23.1.2 Aug-3-2026-Hotfix; < 23.1.2 Aug-3-2026-Hotfix (unaffected, semver). Source: CNA: hackerone

## Severity and prioritization

- CVSS 3.0: 7.6 (high); CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H; source: CNA: hackerone

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-78

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://security-portal.versa-networks.com/emailbulletins/6af2299bdd1c93ddc0a3e832 (CNA: hackerone)

## Provenance

- CNA: hackerone: https://www.cve.org/CVERecord?id=CVE-2026-107240; retrieved 2026-11-10; source updated 2026-11-10

Revision: d24e127f521c0c9ddfef8f3ac22b1cd9700f2d9e4cfebd3a3b6a8a25717f0acb

Canonical: https://y2.dev/cve/CVE-2026-107240

## Agent and API access

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- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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