CVE-2026-127046
MISP Modules Website Exposes External Tool API Keys in /external_tools/list Response
Description
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.
INFO
Published Date :
Nov. 12, 2026, 12:18 p.m.
Last Modified :
Nov. 12, 2026, 12:18 p.m.
Remotely Exploit :
Yes !
Source :
5a6e4751-2f3f-4070-9419-94fb35b644e8
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 5a6e4751-2f3f-4070-9419-94fb35b644e8 | |||||
| CVSS 4.0 | CRITICAL | 5a6e4751-2f3f-4070-9419-94fb35b644e8 | ||||
| CVSS 4.0 | CRITICAL | 5a6e4751-2f3f-4070-9419-94fb35b644e8 |
Solution
- Implement authentication for the /external_tools/list endpoint.
- Sanitize API keys in the ExternalTools model serializer.
- Remove API key pre-population from edit forms.
- Update MISP Modules to the latest version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-127046.
| URL | Resource |
|---|---|
| https://github.com/MISP/misp-modules/commit/61c27893066cee80d9711649765ebc2bccd0e4af |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-127046 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-127046
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-127046 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-127046 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 5a6e4751-2f3f-4070-9419-94fb35b644e8
Nov. 12, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 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 Added CWE CWE-200 Added CWE CWE-522 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/127xxx/CVE-2026-127046.json">CVE-2026-127046</a> Added Reference https://github.com/MISP/misp-modules/commit/61c27893066cee80d9711649765ebc2bccd0e4af Added SSVC {'role': 'Supplier', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-11-12T11:59:08Z'}