# CVE-2026-122019: 6amTech 6valley Social Login Flow existing-account-check existingAccountCheck authorization

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

A vulnerability was identified in 6amTech 6valley 16.0. Impacted is the function existingAccountCheck of the file /api/v1/auth/existing-account-check of the component Social Login Flow. Such manipulation of the argument user_response leads to authorization bypass. The attack may be launched remotely. The exploit is publicly available and might be used.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- 6amTech / 6valley: 16.0 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 7.3 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 7.3 (high); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 7.5 (high); AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-639, CWE-285

## Exploit evidence

- exploit: https://github.com/oscar2744/CVE-Submit/issues/3 (CNA: VulDB)

## References

- https://vuldb.com/vuln/431085 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/431085/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-122019 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1024992 (CNA: VulDB; third-party-advisory)

- https://github.com/oscar2744/CVE-Submit/issues/3 (CNA: VulDB; exploit, issue-tracking)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-122019; retrieved 2026-11-04; source updated 2026-11-04

Revision: abf05f4fa3a048ab3bd6a6d68935e01e4bd54037980a719438561ab5baaba6f9

Canonical: https://y2.dev/cve/CVE-2026-122019

## Agent and API access

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- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- 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.

Collected public records only. Check source status for coverage and freshness.