# CVE-2026-55643: Snipe-IT: Tenant Isolation Bypass in FMCS Floater Mode

> Attackers in FMCS floater mode can bypass tenant isolation to read and modify out-of-scope user data and assets.

- **Severity:** High 7.6 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 19 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** GHSA-c6w2-j4wq-mvwg

## What is CVE-2026-55643?

CVE-2026-55643 is a high-severity missing authorization vulnerability in Snipeitapp Snipe-It, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Snipe-IT is an IT asset/license management system. Prior to 8.6.3, a company-scoped user in FMCS floater mode can access users whose company_id is null because broad API queries and bulk web actions do not consistently apply isCurrentUserHasAccess. The /api/v1/users and /api/v1/users/{id}/licenses endpoints can expose personal data and assigned licenses, /users/bulkeditsave can modify out-of-scope profiles, and /users/merge can soft-delete users and transfer assigned assets. This issue is fixed in version 8.6.3.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-55643?

2 open source packages ship an affected version, including snipe/snipe-it. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `snipe/snipe-it` | Packagist | All versions | 8.6.3 |
| `snipe/snipe-it` | Packagist | All versions | 8.6.3 |

Products: Snipeitapp Snipe-It.

## How do I fix CVE-2026-55643?

Upgrade snipe/snipe-it to 8.6.3 or later.

## Is CVE-2026-55643 being exploited?

There is no known exploitation of CVE-2026-55643 in the wild and no public exploit code.

## Other vulnerabilities in Snipeitapp Snipe-It

- [CVE-2025-63601](https://insights.sbomify.com/CVE-2025-63601/): File upload in n/a (critical 9.9)
- [CVE-2026-37709](https://insights.sbomify.com/CVE-2026-37709/): Snipe-IT has insecure permissions in file uploads (critical 9.8)
- [CVE-2026-86738](https://insights.sbomify.com/CVE-2026-86738/): Snipe-IT before 8.7.0 CSS Injection via Custom CSS (critical 9.3)
- [CVE-2026-116199](https://insights.sbomify.com/CVE-2026-116199/): Snipe-IT before 8.6.3 Authentication Bypass via Google SSO Callback (critical 9.2)
- [CVE-2022-1380](https://insights.sbomify.com/CVE-2022-1380/): Stored Cross Site Scripting vulnerability in Item name parameter in snipe/snipe-it (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-55643 and fix it if it is affected.

What it is: CVE-2026-55643 is a high-severity missing authorization vulnerability in Snipeitapp Snipe-It, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-55643 in the wild and no public exploit code.

Affected packages and fixed versions:
- snipe/snipe-it (Packagist): affected all versions; fixed in 8.6.3
- snipe/snipe-it (Packagist): affected all versions; fixed in 8.6.3

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-2026-55643/ (Markdown: https://insights.sbomify.com/CVE-2026-55643/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-55643
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-55643
- OSV: https://osv.dev/vulnerability/CVE-2026-55643

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-55643/
Summaries are generated and may contain mistakes; the official description above is the record.