CVE-2026-31983 PUBLISHED

Missing authentication in SSH keys synchronization endpoint in Guardian/CMC before 26.2.0

Assigner: Nozomi
Reserved: 10.03.2026 Published: 09.07.2026 Updated: 09.07.2026

A Missing Authentication vulnerability was discovered in the SSH keys synchronization endpoint. An unauthenticated attacker can send a request to the SSH keys synchronization endpoint and obtain the list of users that have uploaded their public SSH keys, their groups, and the uploaded public SSH keys.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Nozomi Networks
Product	Guardian
Versions	Default: unaffected affected from 0 to 26.2.0 (excl.)

Vendor	Nozomi Networks
Product	CMC
Versions	Default: unaffected affected from 0 to 26.2.0 (excl.)

Workarounds

Use internal firewall features to limit access to the web management interface.

Solutions

Upgrade to v26.2.0 or later.

Credits

This issue was found by Andrea Palanca of Nozomi Networks Product Security team during an internal investigation. finder

References

https://security.nozominetworks.com/NN-2026:10-01

Problem Types

CWE-306 Missing authentication for critical function CWE

Impacts

CAPEC-115 Authentication Bypass