# CVE-2026-30231: Flare: Private File IDOR via raw/direct endpoints

> Authenticated non-owners can access private files via raw endpoints, allowing unauthorized data disclosure in Flare file sharing platform.

- **Severity:** Medium 6.0 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/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:** No
- **Published:** 6 Mar 2026
- **Updated:** 9 Mar 2026
- **Also known as:** GHSA-gwqr-xf5c-5569

## What is CVE-2026-30231?

CVE-2026-30231 is a medium-severity missing authorization vulnerability in FlintSH Flare, published on 6 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to version 1.7.2, the raw and direct file routes only block unauthenticated users from accessing private files. Any authenticated, non‑owner user who knows the file URL can retrieve the content, which is inconsistent with stricter checks used by other endpoints. This issue has been patched in version 1.7.2.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-30231?

It affects 1 product.


Products: Flintsh Flare.

## How do I fix CVE-2026-30231?

No fix has been published for CVE-2026-30231 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-30231 being exploited?

There is no known exploitation of CVE-2026-30231 in the wild and no public exploit code.

## Other vulnerabilities in FlintSH Flare

- [CVE-2026-30942](https://insights.sbomify.com/CVE-2026-30942/): Flare has a Path Traversal in /api/avatars/[filename] (high 8.3)
- [CVE-2026-30230](https://insights.sbomify.com/CVE-2026-30230/): Flare: Password‑Protected Thumbnail Bypass (high 8.2)
- [CVE-2026-26993](https://insights.sbomify.com/CVE-2026-26993/): Flare has XSS vulnerability in Raw File Preview (medium 4.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-30231 and fix it if it is affected.

What it is: CVE-2026-30231 is a medium-severity missing authorization vulnerability in FlintSH Flare, published on 6 Mar 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-2026-30231 in the wild and no public exploit code.

Affected product: FlintSH Flare. 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-2026-30231/ (Markdown: https://insights.sbomify.com/CVE-2026-30231/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-30231
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-30231
- OSV: https://osv.dev/vulnerability/CVE-2026-30231

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-30231/
Summaries are generated and may contain mistakes; the official description above is the record.