{"id":"CVE-2025-62820","aliases":["GHSA-x6fh-7qmf-69xh","GO-2025-4068"],"url":"https://o3.security/vulnerability/CVE-2025-62820","summary":"Slack Nebula may accept arbitrary source IP addresses ","details":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","published":"2025-10-23T00:00:00Z","modified":"2026-08-12T03:51:13.780310038Z","cvss":{"score":4.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/slackhq/nebula","fixedVersion":"1.9.7"}],"fix":{"url":"https://github.com/slackhq/nebula/pull/1493","label":"slackhq/nebula#1493"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62820.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62820"},{"type":"FIX","url":"https://github.com/slackhq/nebula/pull/1493"},{"type":"FIX","url":"https://github.com/slackhq/nebula/pull/1494"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:13.780310038Z"}}