{"id":"CVE-2025-62820","revision":null,"records":[{"revision":"1da719b2e7d64b01b07eb44dc0bfae94","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-62820","aliases":[],"title":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","description":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","state":0,"publishedAt":"2025-10-23T00:00:00+00:00","modifiedAt":"2025-10-23T14:35:19.815+00:00","affected":[{"ecosystem":"Vendor product","name":"Nebula","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"Nebula\",\n                    \"vendor\": \"Slack\",\n                    \"versions\": [\n                        {\n                            \"lessThan\": \"1.9.7\",\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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,"severity":"MEDIUM"}],"references":["https://github.com/slackhq/nebula/pull/1493","https://github.com/slackhq/nebula/pull/1494"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-62820","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-62820","identifiers":["CVE-2025-62820"]},"retained":false,"historicalAffected":[]},{"revision":"a11b9f01944e4c4fabb9a31f068789db","observedAt":"2026-11-11T04:30:44.805+00:00","statement":{"source":"euvd","id":"EUVD-2025-35657","aliases":["CVE-2025-62820","GHSA-x6fh-7qmf-69xh"],"title":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","description":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 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,"severity":null}],"references":["https://github.com/slackhq/nebula/pull/1493","https://github.com/slackhq/nebula/pull/1494"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-35657","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 23, 2025, 12:00:00 AM","dateUpdated":"Oct 23, 2025, 2:35:19 PM"},"relatedAdvisories":[{"id":"openSUSE-SU-2025:15710-1","title":"govulncheck-vulndb-0.0.20251105T184115-1.1 on GA media","vulnerabilityIds":["CVE-2016-11063","CVE-2016-11066","CVE-2016-11067","CVE-2016-11068","CVE-2016-11069","CVE-2016-11070","CVE-2016-11071","CVE-2016-11072","CVE-2016-11073","CVE-2016-11074","CVE-2016-11075","CVE-2016-11076","CVE-2016-11077","CVE-2016-11078","CVE-2016-11079","CVE-2016-11080","CVE-2016-11081","CVE-2016-11082","CVE-2016-11083","CVE-2016-11084","CVE-2017-18872","CVE-2023-32199","CVE-2024-58269","CVE-2025-10545","CVE-2025-10678","CVE-2025-10954","CVE-2025-11374","CVE-2025-11375","CVE-2025-11579","CVE-2025-11621","CVE-2025-12044","CVE-2025-26625","CVE-2025-27093","CVE-2025-41410","CVE-2025-41443","CVE-2025-54286","CVE-2025-54287","CVE-2025-54288","CVE-2025-54289","CVE-2025-54290","CVE-2025-54291","CVE-2025-54293","CVE-2025-54469","CVE-2025-54470","CVE-2025-54471","CVE-2025-54499","CVE-2025-58073","CVE-2025-58075","CVE-2025-58356","CVE-2025-59043","CVE-2025-59048","CVE-2025-59530","CVE-2025-59836","CVE-2025-59937","CVE-2025-61141","CVE-2025-61524","CVE-2025-61581","CVE-2025-61688","CVE-2025-62156","CVE-2025-62157","CVE-2025-62375","CVE-2025-62506","CVE-2025-62513","CVE-2025-62705","CVE-2025-62714","CVE-2025-62725","CVE-2025-62820","CVE-2025-64101","CVE-2025-64102","CVE-2025-64103"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2025-35657","identifiers":["EUVD-2025-35657","CVE-2025-62820","GHSA-x6fh-7qmf-69xh"]},"retained":false,"historicalAffected":[]},{"revision":"c26bc75fdc804f5a88f1cca2fa084cb0","observedAt":"2026-10-25T03:17:29.935+00:00","statement":{"source":"nvd","id":"CVE-2025-62820","aliases":[],"title":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","description":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","state":0,"publishedAt":"2025-10-23T04:18:57.453+00:00","modifiedAt":"2026-10-08T11:10:00.25+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · cve@mitre.org · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L","score":4.9,"severity":"MEDIUM"}],"references":["https://github.com/slackhq/nebula/pull/1493","https://github.com/slackhq/nebula/pull/1494"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-62820","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-420"],"productCriteria":[],"sourceDates":{"published":"2025-10-23T04:18:57.453","lastModified":"2026-10-08T11:10:00.250"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2025-62820","identifiers":["CVE-2025-62820"]},"retained":false,"historicalAffected":[]},{"revision":"7002ba5e162c4fe0ba39e17a67c3df82","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-x6fh-7qmf-69xh","aliases":["CVE-2025-62820","GO-2025-4068"],"title":"Slack Nebula may accept arbitrary source IP addresses ","description":"Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.","state":0,"publishedAt":"2025-10-23T06:31:00+00:00","modifiedAt":"2026-09-10T03:50:30.4060594+00:00","affected":[{"ecosystem":"Go","name":"github.com/slackhq/nebula","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.9.4"},{"kind":"fixed","version":"1.9.7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["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/slackhq/nebula"],"sourceUrl":"https://github.com/advisories/GHSA-x6fh-7qmf-69xh","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-x6fh-7qmf-69xh","identifiers":["GHSA-x6fh-7qmf-69xh","CVE-2025-62820","GO-2025-4068"]},"retained":false,"historicalAffected":[]},{"revision":"3be06ac3f28042a585f41b93e1fd432d","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2025-4068","aliases":["CVE-2025-62820","GHSA-x6fh-7qmf-69xh"],"title":"Slack Nebula may accept arbitrary source IP addresses in github.com/slackhq/nebula","description":"Slack Nebula may accept arbitrary source IP addresses in github.com/slackhq/nebula","state":0,"publishedAt":"2025-10-30T15:02:33+00:00","modifiedAt":"2026-02-04T03:45:44.247567+00:00","affected":[{"ecosystem":"Go","name":"github.com/slackhq/nebula","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.9.4"},{"kind":"fixed","version":"1.9.7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/advisories/GHSA-x6fh-7qmf-69xh","https://nvd.nist.gov/vuln/detail/CVE-2025-62820","https://github.com/slackhq/nebula/commit/e264a0ff888c7bf0568579306755a60fc42f6ecc","https://github.com/slackhq/nebula/pull/1493","https://github.com/slackhq/nebula/pull/1494"],"sourceUrl":"https://osv.dev/vulnerability/GO-2025-4068","license":"OSV · upstream source license applies","key":"osv:GO-2025-4068","identifiers":["GO-2025-4068","CVE-2025-62820","GHSA-x6fh-7qmf-69xh"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-11T09:57:43.3267414+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-11T09:57:43.3267414+00:00","lastSuccessAt":"2026-11-11T09:57:46.3036784+00:00","error":null,"lastVerifiedAt":"2026-11-11T09:57:46.3038639+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-de3b77103708811b6494d2ff7c979037d73ae579742cd1649a5c765137ae5083-f19af5e22c13aa688d23829fe96c281d0deaf6cf2f8cee6748f54f5a479127b2","complete":true,"records":424021,"lastAttemptAt":"2026-11-11T09:57:38.9264743+00:00","lastSuccessAt":"2026-11-11T09:25:54.5258746+00:00","error":null,"lastVerifiedAt":"2026-11-11T09:57:38.9264743+00:00","snapshotPublishedAt":"2026-11-11T09:25:28+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-f581ef223ba240a69a1abcff00ee4876","complete":true,"records":13758,"lastAttemptAt":"2026-11-11T09:58:42.1822037+00:00","lastSuccessAt":"2026-11-11T09:58:42.065+00:00","error":null,"lastVerifiedAt":"2026-11-11T09:58:42.065+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13812,"expectedIdentifiers":13812,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-11T09:57:43.3267414+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-11T09:57:43.3267414+00:00","lastSuccessAt":"2026-11-11T09:57:52.273871+00:00","error":null,"lastVerifiedAt":"2026-11-11T09:57:52.273872+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-304fa97221904da4b3dcd306fc4b8a4b","complete":true,"records":13752,"lastAttemptAt":"2026-11-11T09:57:53.9573384+00:00","lastSuccessAt":"2026-11-11T09:26:01.454+00:00","error":null,"lastVerifiedAt":"2026-11-11T09:26:01.454+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13812,"expectedIdentifiers":13812,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-3562b6c78fd1bd0f0b55daf66a0926ae24f65e462df7f6d928caad458fc696bf","complete":true,"records":9947,"lastAttemptAt":"2026-11-11T09:57:42.4406155+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-11T09:57:42.4406155+00:00","snapshotPublishedAt":"2026-11-11T03:32:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-456002455e0ab94bb92c95476d4e6d175c104cd594749982afd96c893728ecbc","complete":true,"records":2010,"lastAttemptAt":"2026-11-11T09:57:39.9639043+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-11T09:57:39.9639043+00:00","snapshotPublishedAt":"2026-11-11T01:17:51+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-2bc186fc4a8179fd66d765079d475b0b8e3af9f89b57dcc310e7773ded48b2cc","complete":true,"records":3088,"lastAttemptAt":"2026-11-11T09:57:43.196106+00:00","lastSuccessAt":"2026-11-11T09:25:59.9234294+00:00","error":null,"lastVerifiedAt":"2026-11-11T09:57:43.196106+00:00","snapshotPublishedAt":"2026-11-11T09:02:55+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-085e065fc9050ae18408f7e722c39653aeb186872334d7b3ec1fcafb7ed43d25","complete":true,"records":231665,"lastAttemptAt":"2026-11-11T09:57:41.7897107+00:00","lastSuccessAt":"2026-11-11T08:27:45.2700102+00:00","error":null,"lastVerifiedAt":"2026-11-11T09:57:41.7897107+00:00","snapshotPublishedAt":"2026-11-11T07:32:59+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}