# CVE-2026-78051: alexta69 MeTube Cookie File cookies.txt file access

> Remote attackers can access sensitive cookie files via path traversal in MeTube, requiring an upgrade to mitigate.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Aug 2026
- **Updated:** 24 Aug 2026
- **Also known as:** GHSA-hj5g-p3v4-3cw5, GHSA-hjhm-cmvf-w9vp

## What is CVE-2026-78051?

CVE-2026-78051 is a medium-severity path traversal vulnerability in alexta69 MeTube, published on 22 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was determined in alexta69 MeTube up to 2026.06.10. The impacted element is an unknown function of the file /download/.metube/cookies.txt of the component Cookie File Handler. This manipulation causes files or directories accessible. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2026.06.20 is sufficient to resolve this issue. Patch name: ce897ee00903bf7ded406f0d7852d95dd4164add. You should upgrade the affected component.

Weakness: CWE-552 (Files or Directories Accessible to External Parties), CWE-425 (Direct Request)

## Which versions are affected by CVE-2026-78051?


## How do I fix CVE-2026-78051?

No fix has been published for CVE-2026-78051 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-78051 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78051 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78051 and fix it if it is affected.

What it is: CVE-2026-78051 is a medium-severity path traversal vulnerability in alexta69 MeTube, published on 22 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78051 exists.

Affected product: alexta69 MeTube. 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-2026-78051/ (Markdown: https://insights.sbomify.com/CVE-2026-78051/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78051
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78051
- OSV: https://osv.dev/vulnerability/CVE-2026-78051

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-78051/
Summaries are generated and may contain mistakes; the official description above is the record.