# CVE-2026-58052: 7-Zip - Mark-of-the-Web Bypass via RAR5 Alternate Data Stream Name Collision

> Attackers can bypass Mark-of-the-Web and SmartScreen warnings in 7-Zip by crafting RAR5 archives with specific alternate data stream names.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 28 Jun 2026
- **Updated:** 14 Jul 2026
- **Also known as:** DEBIAN-CVE-2026-58052, GHSA-fx33-p83c-vpr5, JLSEC-2026-1169, MINI-x8pg-5c25-pcmm, openSUSE-SU-2026:11777-1, openSUSE-SU-2026:11792-1

## What is CVE-2026-58052?

CVE-2026-58052 is a medium-severity vulnerability in 7-Zip, published on 28 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

7-Zip for Windows through 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because its guard that suppresses an archive-supplied Zone.Identifier stream matches the exact name 'Zone.Identifier' while a RAR5 STM record named ':Zone.Identifier:$DATA' is not matched and NTFS canonicalizes it to the same stream, overwriting the propagated Internet-zone marker with ZoneId=0. A second STM record named '::$DATA' overwrites the extracted file's default data stream, letting an attacker defeat SmartScreen/MotW warnings and spoof file content.

Weakness: CWE-693 (Protection Mechanism Failure)

## Which versions are affected by CVE-2026-58052?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `7zip` | openSUSE:Tumbleweed | All versions | 26.03-1.1 |
| `lzma-sdk` | openSUSE:Tumbleweed | All versions | 26.03-1.1 |

Products: 7-Zip 7-Zip.

## How do I fix CVE-2026-58052?

Upgrade to a fixed version.

## Is CVE-2026-58052 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-58052 exists.

## Other vulnerabilities in 7-Zip

- [CVE-2025-0411](https://insights.sbomify.com/CVE-2025-0411/): 7-Zip Mark of the Web Bypass (high 7.0, exploited in the wild)
- [CVE-2008-6536](https://insights.sbomify.com/CVE-2008-6536/): Other in n/a (critical 10.0)
- [CVE-2026-48095](https://insights.sbomify.com/CVE-2026-48095/): GHSL-2026-140_7-Zip: 7-Zip has a heap buffer overflow via NTFS compressed stream buffer under-allocation (high 8.8)
- [CVE-2018-10172](https://insights.sbomify.com/CVE-2018-10172/): Privilege escalation in n/a (high 8.8)
- [CVE-2016-2335](https://insights.sbomify.com/CVE-2016-2335/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-58052 and fix it if it is affected.

What it is: CVE-2026-58052 is a medium-severity vulnerability in 7-Zip, published on 28 Jun 2026. It can only be exploited from the same machine or local network, 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-2026-58052 exists.

Affected product: 7-Zip. 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-2026-58052/ (Markdown: https://insights.sbomify.com/CVE-2026-58052/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-58052
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-58052
- OSV: https://osv.dev/vulnerability/CVE-2026-58052

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-58052/
Summaries are generated and may contain mistakes; the official description above is the record.