# Astro's server source code is exposed to the public if sourcemaps are enabled

Advisory record · `GHSA-49w6-73cw-chjr`

- **Identifiers:** `GHSA-49w6-73cw-chjr` · `CVE-2024-56159`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **Weakness (CWE):** [CWE-219](https://cwe.mitre.org/data/definitions/219.html)
- **Tags:** [CWE-219](https://agentprime.io/advisories/tag/cwe-219.md)
- **Published:** 19 Dec 2024
- **Updated:** 27 Nov 2025
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 19 Dec 2024, 15:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `astro` (npm): affected `>=5.0.0-alpha.0, <5.0.8 || <4.16.18`; fixed in `5.0.8`, `4.16.18`

## 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 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:L`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.015, the 75th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 19 Dec 2024. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-49w6-73cw-chjr](https://github.com/advisories/GHSA-49w6-73cw-chjr)
- [OSV: GHSA-49w6-73cw-chjr](https://osv.dev/vulnerability/GHSA-49w6-73cw-chjr)
- <https://github.com/withastro/astro/security/advisories/GHSA-49w6-73cw-chjr>
- <https://nvd.nist.gov/vuln/detail/CVE-2024-56159>
- <https://github.com/withastro/astro/issues/12703>
- <https://github.com/withastro/astro/commit/039d022b1bbaacf9ea83071d27affc5318e0e515>
- <https://github.com/withastro/astro/commit/c879f501ff01b1a3c577de776a1f7100d78f8dd5>
- <https://github.com/getsentry/sentry-javascript/blob/develop/packages/astro/src/integration/index.ts#L50>
- <https://github.com/withastro/astro>
- <https://github.com/withastro/astro/blob/176fe9f113fd912f9b61e848b00bbcfecd6d5c2c/packages/astro/src/core/build/static-build.ts#L139>

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-49w6-73cw-chjr>, 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-49w6-73cw-chjr/>. Everything for agents: <https://agentprime.io/llms.txt>.