CVE-2026-123198

Description

LMFDB before commit 01829bd contains a server-side template injection vulnerability in the render_knowl function that allows unauthenticated attackers to inject Jinja expressions via request parameters. Attackers can supply crafted query-string values or 'content' data to /knowledge/render/<ID> to reach Python builtins and execute operating system commands as the web application account.

References

• https://github.com/LMFDB/lmfdb/blob/c6e5bac205aa12de9edf584a06328fefa81de0de/lmfdb/knowledge/main.py#L747
• https://github.com/LMFDB/lmfdb/commit/01829bd09b692c720aad30c952758a20630573d4
• https://github.com/LMFDB/lmfdb/pull/7231
• https://github.com/LMFDB/lmfdb/security/advisories/GHSA-6jw3-pmcx-2xww
• https://www.vulncheck.com/advisories/lmfdb-before-commit-01829bd-unauthenticated-server-side-template-injection-via-knowledge-render-id