GitHub Advisoryadvisory · Go

GHSA-x6fh-7qmf-69xh Slack Nebula may accept arbitrary source IP addresses

MEDIUM Published 2025-10-23 Modified 2025-10-23 Official page ↗

Aliases: CVE-2025-62820
Ecosystem: Go
Packages: github.com/slackhq/nebula
Severity: Moderate
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L
Weaknesses: CWE-420
Reviewed: 2025-10-23

Affected packages

• Go github.com/slackhq/nebula: >= 1.9.4, < 1.9.7 → fixed in 1.9.7

Description

Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.

Related

Alias · CVE (1)

CVE-2025-62820 Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network. vulnerability

Weakness · CWE (1)

CWE-420 Unprotected Alternate Channel weakness

References