CVE-2026-123198

CRITICAL 9.8

LMFDB before commit 01829bd Unauthenticated Server-Side Template Injection via /knowledge/render/<ID>

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-1336
Vendor	lmfdb
Product	lmfdb
Published	Nov 5, 2026
Last Updated	Nov 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

LMFDB / LMFDB

0 < 01829bd09b692c720aad30c952758a20630573d4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Tommaso Bona edgarcosta