CVE-2026-123198

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductLMFDB

PublishedNov 5, 2026

First seenNov 5, 2026

Weakness typeCWE-1336CWE-1336

How to fix

Update

LMFDB LMFDB01829bd09b692c720aad30c952758a20630573d4 or later

Patches

Vendor advisories

github.com/LMFDB/lmfdb/security/advisories/GHSA-6jw3-pmcx-2xww

Affected products

Product	Affected versions	Fixed in
LMFDB LMFDB	v < 01829bd09b692c720aad30c952758a20630573d4	01829bd09b692c720aad30c952758a20630573d4

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