# CVE-2026-1415: GPAC media_export.c gf_media_export_webvtt_metadata null pointer dereference

> A local attacker can cause a denial of service in GPAC via a null pointer dereference in WebVTT metadata export.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Jan 2026
- **Updated:** 23 Feb 2026
- **Also known as:** DEBIAN-CVE-2026-1415, GHSA-r58r-mmgc-mr7f, UBUNTU-CVE-2026-1415

## What is CVE-2026-1415?

CVE-2026-1415 is a medium-severity vulnerability in Gpac Gpac, published on 26 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability was identified in GPAC up to 2.4.0. Affected is the function gf_media_export_webvtt_metadata of the file src/media_tools/media_export.c. The manipulation of the argument Name leads to null pointer dereference. The attack must be carried out locally. The exploit is publicly available and might be used. The identifier of the patch is af951b892dfbaaa38336ba2eba6d6a42c25810fd. To fix this issue, it is recommended to deploy a patch.

Weakness: CWE-476 (NULL Pointer Dereference), CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2026-1415?

It affects 1 product.


Products: Gpac Gpac.

## How do I fix CVE-2026-1415?

No fix has been published for CVE-2026-1415 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-1415 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1415 exists.

## Other vulnerabilities in Gpac Gpac

- [CVE-2023-46427](https://insights.sbomify.com/CVE-2023-46427/): Null dereference in n/a (critical 9.8)
- [CVE-2023-46932](https://insights.sbomify.com/CVE-2023-46932/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-36190](https://insights.sbomify.com/CVE-2022-36190/): Use after free in n/a (critical 9.8)
- [CVE-2021-28300](https://insights.sbomify.com/CVE-2021-28300/): Null dereference in n/a (critical 9.8)
- [CVE-2020-11558](https://insights.sbomify.com/CVE-2020-11558/): Use after free in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1415 and fix it if it is affected.

What it is: CVE-2026-1415 is a medium-severity vulnerability in Gpac Gpac, published on 26 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1415 exists.

Affected product: Gpac Gpac. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-1415/ (Markdown: https://insights.sbomify.com/CVE-2026-1415/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1415
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1415
- OSV: https://osv.dev/vulnerability/CVE-2026-1415

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1415/
Summaries are generated and may contain mistakes; the official description above is the record.