CVE-2026-82074: 
MongoDB 脆弱性の分析と軽減

CVE-2026-82074 is an incorrect authorization vulnerability in the MongoDB Server aggregation framework. An authenticated user with minimal privileges can craft a specially formatted aggregation request that causes the server's authorization subsystem to evaluate a different operation than what is actually executed, resulting in unauthorized read access to collection data within the target database. Affected versions include MongoDB Server 7.0.0 through 7.0.40 and 8.0.0 through 8.0.29. It carries a CVSS v3.1 base score of 6.5 (Medium) and a CVSS v4.0 base score of 7.1 (High) (Feedly, MongoDB Jira).

The root cause is classified as CWE-863 (Incorrect Authorization), where the aggregation framework's authorization subsystem evaluates a different operation than the one actually executed. An authenticated, low-privileged attacker can send a specially crafted aggregation pipeline request over the network — requiring no user interaction — that exploits this authorization logic mismatch to bypass access controls. The precondition for exploitation is a valid low-privilege account on the target MongoDB instance; no elevated permissions are required (Feedly, MongoDB Jira).

Successful exploitation allows an authenticated attacker with minimal privileges to gain unauthorized read access to collection data within the target database, resulting in a high confidentiality impact. There is no integrity or availability impact, and the scope is unchanged, meaning the attacker cannot leverage this vulnerability to directly affect other components. However, unauthorized access to sensitive database collections could expose confidential application data, credentials, or personally identifiable information stored in MongoDB (Feedly).

As of the disclosure date, there are no known public proof-of-concept exploits or reports of in-the-wild exploitation for CVE-2026-82074 (Feedly). The EPSS score is approximately 0.248%, indicating a low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, and the SSVC assessment notes exploitation status as "none" with technical impact rated as "partial" (Feedly). Detection coverage exists via Tenable Nessus plugin 344380 (Tenable).

MongoDB has released patched versions addressing this vulnerability: upgrade to MongoDB Server 7.0.41 or later for the 7.0.x branch, and 8.0.30 or later for the 8.0.x branch (MongoDB Jira). Organizations unable to upgrade immediately should restrict database user privileges to the minimum necessary and audit existing user roles to limit exposure. Network-level controls such as firewall rules restricting MongoDB access to trusted hosts can reduce the attack surface.

Security aggregators including SecurityOnline and VulDB have catalogued the vulnerability shortly after disclosure (SecurityOnline, VulDB). No notable researcher commentary or significant social media discussion has been identified at this time.