Medium severity · published Jul 22, 2026
CVE-2026-13067
tlsCATrusts Role Restriction Not Enforced via PROXY Protocol v2 on Unix Domain Socket
6.3
CVSS
0.1%
EPSS
No
On KEV
Description
When PROXY protocol v2 is used on the Unix domain socket path, roles derived from X.509 client certificates may not be validated against the configured tlsCATrusts allow-list. This can result in unintended role assignments following MONGODB-X509 authentication. Affected scenarios require local access to the proxy Unix domain socket and a valid X.509 certificate issued by a trusted certificate authority.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
MongoDB · MongoDB
8.0 before 8.0.28; 8.3.0 before 8.3.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-13067
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-13067
Vendor Advisory
https://jira.mongodb.org/browse/SERVER-128387
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