# CVE-2026-45229: Quark Drive (quark-auto-save) < 0.8.5 Mass Assignment via POST /update

> Authenticated attackers can overwrite administrator credentials via mass assignment in the update endpoint, gaining persistent access and locking out legitimate admins.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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:** 13 May 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-x5vh-96v7-w3ph

## What is CVE-2026-45229?

CVE-2026-45229 is a high-severity missing authorization vulnerability in Cp0204 quark-auto-save, published on 13 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Quark Drive before 0.8.5 contains a mass assignment vulnerability in the POST /update endpoint that allows authenticated attackers to overwrite administrator credentials by posting an arbitrary webui object to the config_data dictionary. Attackers can exploit insufficient deny-list filtering to permanently replace stored login credentials, lock out legitimate administrators, and gain persistent access to all configured tasks, cloud tokens, and notification services.

Weakness: CWE-915 (Improperly Controlled Modification of Dynamically-Determined Object Attributes)

## Which versions are affected by CVE-2026-45229?


## How do I fix CVE-2026-45229?

No fix has been published for CVE-2026-45229 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-45229 being exploited?

There is no known exploitation of CVE-2026-45229 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-45229 and fix it if it is affected.

What it is: CVE-2026-45229 is a high-severity missing authorization vulnerability in Cp0204 quark-auto-save, published on 13 May 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-2026-45229 in the wild and no public exploit code.

Affected product: Cp0204 quark-auto-save. 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-2026-45229/ (Markdown: https://insights.sbomify.com/CVE-2026-45229/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-45229
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45229
- OSV: https://osv.dev/vulnerability/CVE-2026-45229

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-45229/
Summaries are generated and may contain mistakes; the official description above is the record.