Skip to content
Fencer Intel
critical 9.2

CVE-2026-127016 json

MISP Modules Website: Missing Authorization on External Tool Management Endpoints

published 3d ago modified 3d ago also EUVD-2026-124335

cvss
9.2
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

Summary

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.

Patch / fix

Is CVE-2026-127016 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
3d ago

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by version score vector
CNA 4.0 9.2 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
CNA 4.0 9.2 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Inferred packages

No advisory lists a package for this vulnerability yet. The CVE names these as products and links their GitHub repository, and the package registry names the same repository, so they are probably the affected packages. Low confidence: the versions are the CVE’s own for the product, and a stack check reports the package as unchecked when there are none.

ecosystem package repository affected
pypi misp-modules misp/misp-modules
<= 3.1.4

Affected products

  • misp misp-modules

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.