CVE-2026-112067 TYPO3 CVE debrief

Who should care

Defenders responsible for forms that use this CAPTCHA extension as their only protection against automated submissions should be particularly concerned. They should verify the presence and configuration of this extension in their systems and consider alternative or additional protective measures.

Why it matters

The CVE-2026-112067 vulnerability in a CAPTCHA extension allows automated clients to bypass the CAPTCHA challenge, potentially exposing forms that rely solely on this CAPTCHA to bot abuse. Defenders should verify the presence and configuration of this extension in their systems, especially for critical forms, and consider additional protective measures.

• Verification of CAPTCHA configuration and effectiveness is required to prevent bot abuse.
• Forms relying solely on this CAPTCHA may need additional protective measures.

Technical summary

The CAPTCHA extension stores the correct answer to each CAPTCHA challenge within the image data of the CAPTCHA itself. In its default configuration, where the audio feature is enabled, this allows anyone who can request a CAPTCHA image to read the answer and submit it, effectively allowing automated clients to bypass the CAPTCHA challenge. This issue is particularly concerning for forms that rely solely on this CAPTCHA for protection against automated submissions, as it leaves them exposed to abuse by bots.

Defensive priority

Defenders should prioritize verifying the presence and configuration of this CAPTCHA extension in their systems, especially for forms that rely on it as the sole protection against automated submissions.

Recommended defensive actions

• Verify the presence and configuration of the CAPTCHA extension in your systems.
• Assess forms that rely on this CAPTCHA as their sole protection against automated submissions.
• Consider alternative or additional protective measures for forms.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and NVD entry provide details about the vulnerability. However, the extent of affected systems and versions is not clearly stated, requiring further verification and analysis to understand the full scope of the vulnerability. Defenders should verify the presence and configuration of this CAPTCHA extension in their systems, especially for critical forms, and consider additional protective measures. The information available suggests that the vulnerability allows automated clients to bypass the CAPTCHA challenge, which is

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.