VulnerabilityDeferred

CVE-2026-77145

The permission check for the frontend management update flow verified a different event than the one the request went on to modify.

HIGH 7.1EPSS 0.21%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

The permission check for the frontend management update flow verified a different event than the one the request went on to modify. A user with frontend event management access could therefore modify events belonging to other organizers.

CVSS 4.0: 7.1 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.21% probability · 11th percentile
CISA KEV: Not listed
Weakness: CWE-639
Source: f4fb688c-4412-4426-b4b8-421ecf27b14a

References

https://typo3.org/security/advisory/typo3-ext-sa-2026-026

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.