# Croc sender may place ANSI or CSI escape sequences in filename to attach receiver's terminal device

Advisory record · `GHSA-364c-vvqx-446c`

- **Identifiers:** `GHSA-364c-vvqx-446c` · `CVE-2023-43620` · `GO-2023-2068`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **Weakness (CWE):** [CWE-116](https://cwe.mitre.org/data/definitions/116.html)
- **Tags:** [CWE-116](https://agentprime.io/advisories/tag/cwe-116.md)
- **Published:** 20 Sept 2023
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 20 Sept 2023, 06:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `github.com/schollz/croc/v9` (Go): affected `<9.6.16`; fixed in `9.6.16`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Croc (github.com/schollz/croc/v9) versions before 9.6.16 are vulnerable. A sender can include ANSI or CSI escape sequences in a filename, which can affect the terminal of a receiver when the file is received. The source gives few details about the exact impact. Upgrade to version 9.6.16 or later.

Written 2 Nov 2026.

## 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

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.0037, the 30th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:15 UTC: First seen by agentprime
- 31 Oct 2026, 14:15 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-364c-vvqx-446c)

## Sources

- [GitHub Advisory Database: GHSA-364c-vvqx-446c](https://github.com/advisories/GHSA-364c-vvqx-446c)
- [OSV: GHSA-364c-vvqx-446c](https://osv.dev/vulnerability/GHSA-364c-vvqx-446c)
- <https://nvd.nist.gov/vuln/detail/CVE-2023-43620>
- <https://github.com/schollz/croc/issues/595>
- <https://github.com/schollz/croc/pull/697>
- <https://github.com/schollz/croc/commit/3f12f75fae2e844c555ec01eeba0b8474938e93a>
- <https://github.com/schollz/croc>
- <https://www.openwall.com/lists/oss-security/2023/09/08/2>
- <http://www.openwall.com/lists/oss-security/2023/09/21/5>

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-364c-vvqx-446c>, 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-364c-vvqx-446c/>. Everything for agents: <https://agentprime.io/llms.txt>.