# CVE-2026-116728: libfvde through 20260923 Heap Out-of-Bounds Read via libfvde_encrypted_metadata_read_type_0x0024


- **Severity:** Medium 6.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 26 Oct 2026
- **Updated:** 26 Oct 2026
- **Also known as:** GHSA-7qjq-mq3w-jp59, UBUNTU-CVE-2026-116728

## What is CVE-2026-116728?

CVE-2026-116728 is a medium-severity vulnerability in libyal libfvde, published on 26 Oct 2026. 

### Official description

libfvde through 20260923 contains a heap out-of-bounds read vulnerability in libfvde_encrypted_metadata_read_type_0x0024() because xml_plist_data_size is not checked against the source metadata block. Attackers can supply a crafted FileVault 2 Core Storage volume that makes libfvde_volume_open() copy past the heap block buffer, crashing the application.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2026-116728?


## How do I fix CVE-2026-116728?

No fix has been published for CVE-2026-116728 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-116728 being exploited?

There is no known exploitation of CVE-2026-116728 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-116728 and fix it if it is affected.

What it is: CVE-2026-116728 is a medium-severity vulnerability in libyal libfvde, published on 26 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-116728 in the wild and no public exploit code.

Affected product: libyal libfvde. 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-2026-116728/ (Markdown: https://insights.sbomify.com/CVE-2026-116728/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-116728
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-116728
- OSV: https://osv.dev/vulnerability/CVE-2026-116728

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-116728/
Summaries are generated and may contain mistakes; the official description above is the record.