---
title: "CVE-2026-51876: DeepTutor - Authorization Bypass"
description: "DeepTutor 1.4.0 contains an authorization bypass caused by reuse of publicly exposed book_id in the book confirmation flow, letting unauthenticated or unauthorized callers overwrite persisted metadata and spine content."
url: https://panop.io/threat-heartbeat/CVE-2026-51876/
---

# CVE-2026-51876 DeepTutor - Authorization Bypass

DeepTutor 1.4.0 contains an authorization bypass caused by reuse of publicly exposed book\_id in the book confirmation flow, letting unauthenticated or unauthorized callers overwrite persisted metadata and spine content.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.26% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-51876)

## Details

Type

Authorization Bypass

Impact

Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Published

1 October 2026

Updated

15 October 2026

Weakness

[CWE-285](https://cwe.mitre.org/data/definitions/285.html)

## Vendor fix

Update to the latest version that patches the authorization bypass vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-51876](https://nvd.nist.gov/vuln/detail/CVE-2026-51876)
- [https://gist.github.com/Ro1ME/c5685936179edcbf942f3fdd745d1473](https://gist.github.com/Ro1ME/c5685936179edcbf942f3fdd745d1473)
- [https://github.com/HKUDS/DeepTutor/issues/514](https://github.com/HKUDS/DeepTutor/issues/514)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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