MediumVulnerability

CVE-2026-113459: TYPO3 OpenAI API key exposed to backend users in page source

Source: NVD(opens in a new tab)
Identifier: CVE-2026-113459
Published: October 20, 2026
Record updated: October 20, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.

Summary

In TYPO3 10 and 11, the configured OpenAI API key is embedded in every backend page so the editor plugin can call the OpenAI service directly from the browser. Any authenticated backend user can read the key and spend the site operator's quota. The issue only applies when an API key has been configured.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

EPSS: Not scored. FIRST had not published an EPSS score for this CVE when it was last checked on October 20, 2026.
Disclosure date: October 20, 2026

Weaknesses and techniques

Weakness (CWE): CWE-201

Affected

Vendors: OpenAI

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: API
Impact: Confidentiality
Labels: security,
industry

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-113459

First tracked: October 20, 2026 at 08:07 AM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 85% (self-assessed)

Summary

Mitigation

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