# CVE-2026-9508: Incorrect Permission Assignment for Critical Resource vulnerability in Suprema's BioStar

> Attackers can download sensitive backup files without authentication if the admin places them in the webroot, leading to data exposure and potential server compromise.

- **Severity:** Critical 10.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 May 2026
- **Updated:** 29 May 2026
- **Also known as:** GHSA-3fmq-xr93-jqc5

## What is CVE-2026-9508?

CVE-2026-9508 is a critical vulnerability in Suprema BioStar 2 (server), published on 29 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Incorrect permission settings on a critical resource in Suprema BioStar 2 (versions 2.9.3 through 2.9.11) that allow backup files to be publicly exposed when the administrator configures their path within the NGINX webroot. This vulnerability allows an attacker with network access to directly download backup ZIP files via ‘http(s)://[server]/download/…’ without requiring authentication. This exposes highly sensitive information that can lead to server impersonation, unauthorized access to databases, and lateral movement.

Weakness: CWE-732 (Incorrect Permission Assignment for Critical Resource)

## Which versions are affected by CVE-2026-9508?


## How do I fix CVE-2026-9508?

No fix has been published for CVE-2026-9508 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-9508 being exploited?

There is no known exploitation of CVE-2026-9508 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-9508 and fix it if it is affected.

What it is: CVE-2026-9508 is a critical vulnerability in Suprema BioStar 2 (server), published on 29 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-9508 in the wild and no public exploit code.

Affected product: Suprema BioStar 2 (server). 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-2026-9508/ (Markdown: https://insights.sbomify.com/CVE-2026-9508/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-9508
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-9508
- OSV: https://osv.dev/vulnerability/CVE-2026-9508

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-9508/
Summaries are generated and may contain mistakes; the official description above is the record.