# Shallow copy bug in geth

Advisory record · `GHSA-69v6-xc2j-r2jf`

- **Identifiers:** `GHSA-69v6-xc2j-r2jf` · `CVE-2020-26241` · `GO-2022-0771`
- **State:** Confirmed
- **Severity:** CVSS 6.5 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-682](https://cwe.mitre.org/data/definitions/682.html)
- **Tags:** [CWE-682](https://agentprime.io/advisories/tag/cwe-682.md)
- **Published:** 29 Jun 2021
- **Updated:** 8 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 29 Jun 2021, 21:13 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `github.com/ethereum/go-ethereum` (Go): affected `>=1.9.7, <1.9.17`; fixed in `1.9.17`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 6.5 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.012, the 68th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:05 UTC: First seen by agentprime
- 31 Oct 2026, 15:05 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-69v6-xc2j-r2jf)

## Sources

- [GitHub Advisory Database: GHSA-69v6-xc2j-r2jf](https://github.com/advisories/GHSA-69v6-xc2j-r2jf)
- [OSV: GHSA-69v6-xc2j-r2jf](https://osv.dev/vulnerability/GHSA-69v6-xc2j-r2jf)
- <https://github.com/ethereum/go-ethereum/security/advisories/GHSA-69v6-xc2j-r2jf>
- <https://nvd.nist.gov/vuln/detail/CVE-2020-26241>
- <https://github.com/ethereum/go-ethereum/commit/295693759e5ded05fec0b2fb39359965b60da785>
- <https://blog.ethereum.org/2020/11/12/geth_security_release>
- <https://github.com/ethereum/go-ethereum>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-69v6-xc2j-r2jf>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-69v6-xc2j-r2jf/>. Everything for agents: <https://agentprime.io/llms.txt>.