# CVE-2026-79513: Denial of service in n/a

> Attackers can cause a Denial of Service in GPAC by submitting a crafted MPD SegmentTimeline that triggers a divide-by-zero error.

- **Severity:** Medium 6.5 (`CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:R`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 9 Sep 2026
- **Updated:** 14 Sep 2026
- **Also known as:** GHSA-893v-gjhq-c9v3, UBUNTU-CVE-2026-79513

## What is CVE-2026-79513?

CVE-2026-79513 is a medium-severity denial of service vulnerability in Gpac Gpac, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A divide-by-zero vulnerability in the gf_dash_get_timeline_duration function (src/media_tools/dash_client.c) of GPAC v26.07.0 allows attackers to cause a Denial of Service (DoS) via a crafted MPD SegmentTimeline. Fixed in 2fd5a06ab226767900fd86edb5a1e8bfc1010640.

Weakness: CWE-369 (Divide By Zero)

## Which versions are affected by CVE-2026-79513?

It affects 1 product.


Products: Gpac Gpac.

## How do I fix CVE-2026-79513?

No fix has been published for CVE-2026-79513 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-79513 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79513 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-2026-79513 and fix it if it is affected.

What it is: CVE-2026-79513 is a medium-severity denial of service vulnerability in Gpac Gpac, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79513 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-2026-79513/ (Markdown: https://insights.sbomify.com/CVE-2026-79513/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-79513
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-79513
- OSV: https://osv.dev/vulnerability/CVE-2026-79513

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-79513/
Summaries are generated and may contain mistakes; the official description above is the record.