CVE-2026-112067 Details
Description
The extension hides the correct answer to each CAPTCHA inside the image data of the CAPTCHA itself. Anyone who can request a CAPTCHA image can read the answer from it and submit it, so automated clients can pass the challenge. This applies to the default configuration, because the audio feature that causes the answer to be embedded is enabled by default. Forms that rely on the CAPTCHA as their only protection against automated submissions are exposed to abuse by bots.
A CAPTCHA bypass vulnerability has been identified in the TYPO3 extension 'Accessible Form Captcha' (bw_captcha), affecting versions 4.0.0 through 5.4.1. The vulnerability arises because the extension embeds the correct answer to each CAPTCHA within the image data. This means that anyone who can request a CAPTCHA image can extract the answer and submit it, allowing automated clients to bypass the challenge. This issue is particularly concerning for forms that rely solely on CAPTCHA to prevent automated submissions, as they become vulnerable to bot abuse.
Users of the 'Accessible Form Captcha' extension are advised to update to version 5.4.2, available from the TYPO3 Extension Manager, Packagist, or the TYPO3 Extensions Repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 20, 2026CISA-ADP
Assessed Oct 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://typo3.org/security/advisory/typo3-ext-sa-2026-030 | TYPO3 | AdvisoryRemedyVendor |
Weakness Enumeration
Affected Products
| Product | Versions |
|---|---|
| TYPO3 Accessible Form Captcha | >= 4.0.0, <= 5.4.1 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 20, 2026 | CVE Modified | CISA-ADP |
| Oct 20, 2026 | New CVE Received | TYPO3 |