Skip to content
Noroxi
NVD / CVE Program· CNA CIRCL

CVE-2026-127046: MISP Modules Website Exposes External Tool API Keys in /external_tools/list Response

CriticalCVSS 9.2 · v4.0—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 36/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • No fixed version is recorded, but the references include a patch (commit or PR) link.

Low priority for now. See the fix and affected versions sections below.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org

The MISP Modules website component contains an information disclosure vulnerability in the external tools management interface. The /external_tools/list endpoint returned stored API keys (the api_key field) in its JSON response via the ExternalTools model serializer. Additionally, the browser-based edit form pre-populated the API key input field with the stored credential value, exposing it in the DOM. The /external_tools/list endpoint is accessible without authentication (the regression tests verify the response for both authenticated and unauthenticated clients), meaning any network-reachable client could retrieve the API keys for all configured external tools. These keys are used by the server to authenticate submissions to external analysis or enrichment services, so their disclosure allows an attacker to impersonate the MISP instance or directly access those external services. The vulnerability also affected the edit workflow: the change_config endpoint previously required the API key to be present and non-empty on every save, forcing the key to round-trip through the client. The browser JavaScript stored the key in a reactive state object and updated the in-memory tool list with the credential value, further increasing the window of exposure in client-side memory and network traffic. Affected component: the website sub-application of MISP Modules, specifically the external_tools module (serializer in models.py, list endpoint, and the external_tools_index.html template). The impact is limited to confidentiality of the stored API keys; no integrity or availability impact on the MISP Modules website itself is indicated by the patch.

Published
Nov 12, 2026
Updated
Nov 12, 2026
EPSS
—

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · —

CNA vs NVD score

NVD
—
CNA · CIRCL
9.2
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-127046

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for misp records
Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (CIRCL). Independent of NVD's CPE analysis and usually ahead of it.

  • misp misp-modules

    • up to and including 3.1.4affected · semver

Same product

misp: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-44364misp-modules website - Missing CSRF protection in the website home blueprint
    37Monitor
  • CVE-2026-127016MISP Modules Website: Missing Authorization on External Tool Management Endpoints
    36Monitor
  • CVE-2026-62143Server-Side Request Forgery protection bypass in misp-modules html_to_markdown via IPv4-mapped IPv6 addresses
    33Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-125871Nov 10, 2026 · MISP sourcecache module SSRF allows fetching arbitrary internal URLs via attribute enrichment
    25Monitor
  • ← EarlierCVE-2026-126991Nov 12, 2026 · SPARQL Injection in MISP Wikidata Lookup Module via Unescaped User Input
    21Monitor
  • Later →CVE-2026-128637Nov 13, 2026 · Open Redirect in MISP Modules Website Login via Unvalidated next Parameter
    20Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-62143122 days apartServer-Side Request Forgery protection bypass in misp-modules html_to_markdown via IPv4-mapped IPv6 addresses
    33Monitor
  • CVE-2026-1258712 days apartMISP sourcecache module SSRF allows fetching arbitrary internal URLs via attribute enrichment
    25Monitor
  • CVE-2026-9786348 days apartmisp-modules: Shell Command Injection in MISP cisco_firesight_manager_ACL_rule_export Module via Unescaped Attribute Values
    25Monitor
  • CVE-2026-1269910 days apartSPARQL Injection in MISP Wikidata Lookup Module via Unescaped User Input
    21Monitor

Not on record for this CVE: EPSS history · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

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

nvd-secondary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

The bug in code

The whole CWE-200 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json
{  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

Fixed

json
{  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records