Vulnerability · Published Oct 20, 2026 · Assigned by TYPO3

CVE-2026-112067Captcha Bypass in extension "Accessible Form Captcha" (bw_captcha)

Medium 6.9

In plain English

A medium-severity security flaw in Extension "Accessible Form Captcha" from TYPO3. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 4.0)6.9Medium

Exploit odds (30 days)0.4%top 68.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
TYPO3	Extension "Accessible Form Captcha"	4.0.0 – before 5.4.2

Weakness: CWE-804, CWE-656 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

References

https://typo3.org/security/advisory/typo3-ext-sa-2026-030 vendor-advisory