Description
FrankenPHP is a modern application server for PHP. Prior to 1.11.2, when running FrankenPHP in worker mode, the $_SESSION superglobal is not correctly reset between requests. This allows a subsequent request processed by the same worker to access the $_SESSION data of the previous request (potentially belonging to a different user) before session_start() is called. This vulnerability is fixed in 1.11.2.
Scores
CVSS v3
7.5
EPSS
0.0006
EPSS Percentile
18.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-269
CWE-384
CWE-613
Status
published
Products (2)
dunglas/frankenphp
0 - 1.11.2Go
php/frankenphp
< 1.11.2
Published
Feb 12, 2026
Tracked Since
Feb 18, 2026