What is GHSA-x6fh-7qmf-69xh?

GHSA-x6fh-7qmf-69xh is a security advisory published by GitHub Security Advisories with Medium severity. Slack Nebula may accept arbitrary source IP addresses

Which CVE IDs does GHSA-x6fh-7qmf-69xh cover?

GHSA-x6fh-7qmf-69xh covers the following CVE IDs: CVE-2025-62820. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-x6fh-7qmf-69xh?

GHSA-x6fh-7qmf-69xh has a CVSS v3 base score of 4.9, published by GitHub Security Advisories.

Which products are affected by GHSA-x6fh-7qmf-69xh?

GHSA-x6fh-7qmf-69xh affects 1 product, including: go/github.com/slackhq/nebula:\u003e= 1.9.4, \u003c 1.9.7.

GHSA-x6fh-7qmf-69xhMediumCVSS 4.9

Slack Nebula may accept arbitrary source IP addresses

Vendor

GitHub Security Advisories

Published

October 23, 2025

Last Modified

October 23, 2025

🔗 CVE IDs covered (1)

CVE-2025-62820 →

📋 Description

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

🎯 Affected products1

go/github.com/slackhq/nebula:>= 1.9.4, < 1.9.7

🔗 References (5)

https://nvd.nist.gov/vuln/detail/CVE-2025-62820
https://github.com/slackhq/nebula/pull/1493
https://github.com/slackhq/nebula/pull/1494
https://github.com/slackhq/nebula/commit/e264a0ff888c7bf0568579306755a60fc42f6ecc
https://github.com/advisories/GHSA-x6fh-7qmf-69xh