A vulnerability in the ObsidianReader class of the run-llama/llama_index repository, specifically in version 0.12.27, allows for hardlink-based path traversal. This flaw permits attackers to bypass path restrictions and access sensitive system files, such as /etc/passwd, by exploiting hardlinks. The vulnerability arises from inadequate handling of hardlinks in the load_data() method, where the security checks fail to differentiate between real files and hardlinks. This issue is resolved in version 0.5.2.

AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-22

https://github.com/run-llama/llama_index/commit/a86c96ae0e662492eeb471b658ae849a93f628ff

https://huntr.com/bounties/a654b322-a509-4448-a1f5-0f22850b4687