CVE-2026-78372
RansomLook Missing Authorization Allows Disclosure of Private Group and Ransom Note Data
Description
RansomLook does not consistently enforce authorization checks when accessing groups, markets, and ransom notes marked as private. An unauthenticated or otherwise unauthorized remote attacker can access information associated with private entities through several web views and API endpoints. The affected functionality can disclose private group or market names, ransom-note content, and metadata associated with private groups. The /compare functionality can also be queried directly with the name of a private entity, allowing an unauthorized user to retrieve information such as post counts, mirror totals, and uptime even when the entity is excluded from the normal user interface. The patch explicitly adds a privacy check before returning this information. Ransom-note views, search results, and API endpoints were similarly missing consistent filtering. The fix introduces normalized private-group identifiers and alias handling, then rejects or filters notes associated with private groups before returning them to unauthorized callers. An attacker can exploit the issue remotely without authentication or user interaction, resulting in disclosure of information that was explicitly intended to be restricted to authorized users.
INFO
Published Date :
Aug. 24, 2026, 2:17 p.m.
Last Modified :
Oct. 14, 2026, 1:10 p.m.
Remotely Exploit :
Yes !
Source :
5a6e4751-2f3f-4070-9419-94fb35b644e8
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | CRITICAL | 5a6e4751-2f3f-4070-9419-94fb35b644e8 | ||||
| CVSS 4.0 | CRITICAL | 5a6e4751-2f3f-4070-9419-94fb35b644e8 |
Solution
- Apply the provided patch to enforce privacy checks.
- Filter ransom notes associated with private groups.
- Normalize private group identifiers and aliases.
- Review API endpoints for authorization enforcement.
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-2026-78372.
| URL | Resource |
|---|---|
| https://github.com/RansomLook/RansomLook/commit/dc92d6d5c076bcdbf3476aca42daf0260e8d99d7 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-78372 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-2026-78372
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-78372 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-78372 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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CVE Translated by [email protected]
Oct. 14, 2026
Action Type Old Value New Value Added Translation Title: ransomlook, Description: RansomLook no aplica consistentemente las comprobaciones de autorización al acceder a grupos, mercados y notas de rescate marcadas como privadas. Un atacante remoto no autenticado o de otra manera no autorizado puede acceder a información asociada con entidades privadas a través de varias vistas web y puntos finales de API. La funcionalidad afectada puede divulgar nombres de grupos o mercados privados, contenido de notas de rescate y metadatos asociados con grupos privados. La funcionalidad /compare también puede ser consultada directamente con el nombre de una entidad privada, permitiendo a un usuario no autorizado recuperar información como recuentos de publicaciones, totales de espejos y tiempo de actividad incluso cuyo la entidad está excluida de la interfaz de usuario normal. El parche añade explícitamente una comprobación de privacidad antes de devolver esta información. Las vistas de notas de rescate, los resultados de búsqueda y los puntos finales de API carecían de un filtrado consistente de manera similar. La solución introduce identificadores de grupos privados normalizados y manejo de alias, luego rechaza o filtra las notas asociadas con grupos privados antes de devolverlas a los llamantes no autorizados. Un atacante puede explotar el problema de forma remota sin autenticación ni interacción del usuario, lo que resulta en la divulgación de información que estaba explícitamente destinada a ser restringida a usuarios autorizados. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 24, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-78372', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-24T17:26:24.679295Z'} -
New CVE Received by 5a6e4751-2f3f-4070-9419-94fb35b644e8
Aug. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/RansomLook/RansomLook', 'vendor': 'ransomlook', 'product': 'ransomlook', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '2.0.0'}], 'defaultStatus': 'unaffected'}] Added Description RansomLook does not consistently enforce authorization checks when accessing groups, markets, and ransom notes marked as private. An unauthenticated or otherwise unauthorized remote attacker can access information associated with private entities through several web views and API endpoints. The affected functionality can disclose private group or market names, ransom-note content, and metadata associated with private groups. The /compare functionality can also be queried directly with the name of a private entity, allowing an unauthorized user to retrieve information such as post counts, mirror totals, and uptime even when the entity is excluded from the normal user interface. The patch explicitly adds a privacy check before returning this information. Ransom-note views, search results, and API endpoints were similarly missing consistent filtering. The fix introduces normalized private-group identifiers and alias handling, then rejects or filters notes associated with private groups before returning them to unauthorized callers. An attacker can exploit the issue remotely without authentication or user interaction, resulting in disclosure of information that was explicitly intended to be restricted to authorized users. 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-862 Added Reference https://github.com/RansomLook/RansomLook/commit/dc92d6d5c076bcdbf3476aca42daf0260e8d99d7