Vulnerability · Published Aug 25, 2026 · Assigned by TYPO3

CVE-2026-77146Broken Access Control in extension "femanager" (femanager)

High 8.3

In plain English

A high-severity missing authorization in Extension "femanager" 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 36% of all known vulnerabilities).

Severity (CVSS 4.0)8.3High

Exploit odds (30 days)0.4%top 63.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The extension's invitation controller fails to stop processing after redirecting on invalid input (missing hash, non-existent, disabled, or deleted users), allowing an unauthenticated attacker to set a new password for and re-enable an arbitrary existing frontend user account. This vulnerability is only present in the 8.x versions of the extension.

Affected products (as reported)

Vendor	Product	Versions
TYPO3	Extension "femanager"	8.0.0 – before 8.4.2

Weakness: CWE-862 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://typo3.org/security/advisory/typo3-ext-sa-2026-024 vendor-advisory