CVE-2026-3405 thinkgem JeeSite Connection path traversal

Low 2.3 Published 2 Mar 2026 Updated 2 Mar 2026

Remote attackers can exploit a path traversal vulnerability in the Connection Handler to read arbitrary files from the server.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-3405?

CVE-2026-3405 is a low-severity path traversal vulnerability in thinkgem JeeSite, published on 2 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability has been found in thinkgem JeeSite up to 5.15.1. The affected element is an unknown function of the component Connection Handler. The manipulation leads to path traversal. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-22

Which versions are affected by CVE-2026-3405?

It affects 1 product.

Products include Jeesite Jeesite.

How do I fix CVE-2026-3405?

No fix has been published for CVE-2026-3405 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-3405 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3405 exists.

Sources

Also known as GHSA-jhg4-f3vv-qv4p.