Is there a public exploit for CVE-2026-126991?

No public exploit for CVE-2026-126991 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-126991?

CVE-2026-126991 scores CVSS 5.3 (v4.0), rated medium.

What does CVE-2026-126991 affect?

CVE-2026-126991 affects MISP misp-modules.

5.3 Medium

The Wikidata Lookup expansion module (wiki.py) in MISP misp-modules contained a SPARQL injection vulnerability.

CVE-2026-126991

The Wikidata Lookup expansion module (wiki.py) in MISP misp-modules contained a SPARQL injection vulnerability. The handler function constructed a SPARQL query by directly concatenating the user-supplied text value into the query string without any escaping or parameterization: 'SELECT ?item WHERE { ?item rdfs:label"' + request.get("text") + '" @en }'. An authenticated MISP user with access to the module could supply a crafted text attribute value containing SPARQL syntax (quotes, closing braces, UNION, SERVICE, LIMIT, etc.) to alter the structure of the query sent to the Wikidata SPARQL endpoint. This could allow an attacker to modify the query logic, extract unintended data, or cause the query to fail in ways that expose internal error details. Additionally, the old error handling path formatted raw exception objects into the response string ('wikidata API not accessible {}'.format(e)), potentially leaking internal information such as proxy credentials, query contents, or response bodies. The module also used a spoofed browser user-agent string and the deprecated Wikidata endpoint. The vulnerability required authenticated access to the MISP instance and the ability to invoke the…

Assessment

CVSS: 5.3 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 12 November 2026
Last updated: 12 November 2026
Affected: MISP · misp-modules
Assigner: CIRCL

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

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