{"cve":"CVE-2025-62820","nvd":{"published":"2025-10-23T04:18:57.453","modified":"2026-10-08T11:10:00.250","status":"Deferred","description":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L","score":4.9},"cwes":["CWE-420"],"references":["https://github.com/slackhq/nebula/pull/1493","https://github.com/slackhq/nebula/pull/1494"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:12:35.277909958+00:00"},"epss":{"cve":"CVE-2025-62820","score":0.0022,"percentile":0.12407,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-x6fh-7qmf-69xh","url":"https://osv.dev/vulnerability/GHSA-x6fh-7qmf-69xh","summary":"Slack Nebula may accept arbitrary source IP addresses ","modified":"2026-09-10T03:50:30.406059388Z","packages":[{"ecosystem":"Go","name":"github.com/slackhq/nebula","purl":"pkg:golang/github.com/slackhq/nebula","ranges":[">=1.9.4 <1.9.7"],"fixed":["1.9.7"]}]},{"id":"GO-2025-4068","url":"https://osv.dev/vulnerability/GO-2025-4068","summary":"Slack Nebula may accept arbitrary source IP addresses in github.com/slackhq/nebula","modified":"2026-02-04T03:45:44.247567Z","packages":[{"ecosystem":"Go","name":"github.com/slackhq/nebula","purl":"pkg:golang/github.com/slackhq/nebula","ranges":[">=1.9.4 <1.9.7"],"fixed":["1.9.7"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}