# CVE-2026-62378: RustFS Console: Critical Stored XSS in Preview Modal leading to Administrative Account Takeover

> Attackers can execute stored XSS via malicious PDF previews in the RustFS console, stealing administrator credentials and taking over accounts.

- **Severity:** Critical 9.0 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 Jul 2026
- **Updated:** 16 Jul 2026
- **Also known as:** GHSA-7gcx-wg4x-q9x6

## What is CVE-2026-62378?

CVE-2026-62378 is a critical cross-site scripting vulnerability in rustfs console, published on 15 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

RustFS Console is a web management console for the RustFS distributed file system. From 0.1.7 until 0.1.10, the RustFS Console components/object/preview-modal.tsx and components/object/pdf-viewer.tsx extension-based PDF preview path can render HTML content uploaded as .pdf, allowing stored cross-site scripting in the management console and exposure of administrator AccessKeyId, SecretAccessKey, and SessionToken values. This is caused by a regression of CVE-2026-27822. This vulnerability is fixed in 0.1.10.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-62378?


## How do I fix CVE-2026-62378?

No fix has been published for CVE-2026-62378 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-62378 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-62378 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-62378 and fix it if it is affected.

What it is: CVE-2026-62378 is a critical cross-site scripting vulnerability in rustfs console, published on 15 Jul 2026. Any signed-in user can exploit it over the 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-2026-62378 exists.

Affected product: rustfs console. 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-2026-62378/ (Markdown: https://insights.sbomify.com/CVE-2026-62378/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-62378
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-62378
- OSV: https://osv.dev/vulnerability/CVE-2026-62378

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-62378/
Summaries are generated and may contain mistakes; the official description above is the record.