Critical (9.9). EPSS 79% chance of exploitation in the next 30 days. Fixed in pgadmin4 8.4.
pgAdmin <= 8.3 is affected by a path-traversal vulnerability while deserializing users’ sessions in the session handling code. If the server is running on Windows, an unauthenticated attacker can load and deserialize remote pickle objects and gain code execution. If the server is running on POSIX/Linux, an authenticated attacker can upload pickle objects, deserialize them, and gain code execution.
Severity
CVSS 3.1
9.9 critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
79% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)