---
title: "CVE-2026-113459: TYPO3 - Information Disclosure"
description: "TYPO3 10 and 11 contain an information disclosure caused by embedding the configured OpenAI API key in every backend page, letting authenticated backend users read the key, exploit requires configured API key and backend authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-113459/
---

# CVE-2026-113459 TYPO3 - Information Disclosure

TYPO3 10 and 11 contain an information disclosure caused by embedding the configured OpenAI API key in every backend page, letting authenticated backend users read the key, exploit requires configured API key and backend authentication.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-113459)

## Details

Type

Information Disclosure

Impact

Information Disclosure

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

20 October 2026

Updated

20 October 2026

Weakness

[CWE-201](https://cwe.mitre.org/data/definitions/201.html)

## Vendor fix

Update to the latest TYPO3 version where this issue is fixed or remove the API key from frontend exposure.

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-2026-113459](https://nvd.nist.gov/vuln/detail/CVE-2026-113459)
- [https://typo3.org/security/advisory/typo3-ext-sa-2026-035](https://typo3.org/security/advisory/typo3-ext-sa-2026-035)

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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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