# CVE-2026-7713: crocodilestick Calibre-Web-Automated Kobo auth-token Route kobo_auth.py generate_auth_token improper authorization

> Remote attackers can bypass authorization in the Kobo auth-token route of Calibre-Web-Automated, potentially gaining unauthorized access.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **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:** 4 May 2026
- **Updated:** 5 May 2026
- **Also known as:** GHSA-4hgq-jjgj-6jwm

## What is CVE-2026-7713?

CVE-2026-7713 is a medium-severity missing authorization vulnerability in crocodilestick Calibre-Web-Automated, published on 4 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was detected in crocodilestick Calibre-Web-Automated up to 4.0.6. Affected by this vulnerability is the function generate_auth_token of the file cps/kobo_auth.py of the component Kobo auth-token Route. The manipulation results in improper authorization. The attack may be performed from remote. The exploit is now public and may be used. Upgrading to version 4.0.7 addresses this issue. The patch is identified as 9f50bb2c16160564c9f8777dc2ceed3eb95e4807. The affected component should be upgraded.

Weakness: CWE-285 (Improper Authorization), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2026-7713?


## How do I fix CVE-2026-7713?

No fix has been published for CVE-2026-7713 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-7713 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7713 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7713 and fix it if it is affected.

What it is: CVE-2026-7713 is a medium-severity missing authorization vulnerability in crocodilestick Calibre-Web-Automated, published on 4 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7713 exists.

Affected product: crocodilestick Calibre-Web-Automated. 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-2026-7713/ (Markdown: https://insights.sbomify.com/CVE-2026-7713/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7713
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7713
- OSV: https://osv.dev/vulnerability/CVE-2026-7713

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-7713/
Summaries are generated and may contain mistakes; the official description above is the record.