CVE-2026-123198: critical vulnerability in LMFDB
LMFDB before commit 01829bd Unauthenticated Server-Side Template Injection via /knowledge/render/<ID>
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
25Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
LMFDB · LMFDBReferences
https://github.com/LMFDB/lmfdb/blob/c6e5bac205aa12de9edf584a06328fefa81de0de/lmfdb/knowledge/main.py#L747https://github.com/LMFDB/lmfdb/commit/01829bd09b692c720aad30c952758a20630573d4https://github.com/LMFDB/lmfdb/pull/7231https://github.com/LMFDB/lmfdb/security/advisories/GHSA-6jw3-pmcx-2xwwhttps://www.vulncheck.com/advisories/lmfdb-before-commit-01829bd-unauthenticated-server-side-template-injection-via-knowledge-render-id