# CVE-2026-48055: Streambert: Arbitrary File Write (Zip Slip) via Subtitle Extraction

> Attackers can write arbitrary files to the host filesystem via malicious ZIP archives in Streambert, potentially leading to code execution.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jun 2026
- **Updated:** 17 Jun 2026
- **Also known as:** GHSA-3q2x-3q9p-qwfc

## What is CVE-2026-48055?

CVE-2026-48055 is a critical path traversal vulnerability in truelockmc streambert, published on 16 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and prior, a high-severity Zip Slip vulnerability was identified in Streambert's subtitle extraction logic. The application does not sanitize archive entry filenames during extraction, allowing a malicious archive to perform path traversal and write arbitrary files to the host filesystem. The subtitle extraction process downloads a ZIP archive and extracts its entries. The destination file path is constructed by concatenating the raw archive entry name (extracted.name) directly to the temporary directory path. If a malicious ZIP archive containing directory traversal sequences is processed, it escapes the temporary directory boundaries. The application then writes the extracted payload anywhere on the host filesystem subject to the application's current write permissions. This issue has been fixed in version 2.5.0.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-48055?


## How do I fix CVE-2026-48055?

No fix has been published for CVE-2026-48055 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-48055 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48055 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-48055 and fix it if it is affected.

What it is: CVE-2026-48055 is a critical path traversal vulnerability in truelockmc streambert, published on 16 Jun 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-2026-48055 exists.

Affected product: truelockmc streambert. 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-2026-48055/ (Markdown: https://insights.sbomify.com/CVE-2026-48055/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-48055
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-48055
- OSV: https://osv.dev/vulnerability/CVE-2026-48055

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-48055/
Summaries are generated and may contain mistakes; the official description above is the record.