CVE-2026-77145

7.1 HIGH 0.4% exploit odds No fix listed Auth & access

What it is

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.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account. High risk of data tampering.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2026-08-25 09:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-09-28 23:10 UTC Last updatedMost recent change to the record

Details

Published: 2026-08-25 09:17 UTC
Last modified: 2026-09-28 23:10 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Weakness: CWE-639 · Insecure direct object reference
Record status: Deferred

Attack profile CVSS 4.0 · 7.1

Attack vector: Network
Complexity: Low
Attack requirements: None
Privileges needed: Low
User interaction: None
Confidentiality: Low
Integrity: High
Availability: None

Raw vector

CVSS: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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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References

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

NVD record · CVE.org record