{"cve":"CVE-2026-61672","nvd":{"published":"2026-09-18T17:16:58.537","modified":"2026-09-24T21:25:27.050","status":"Deferred","description":"Capsule is a multi-tenancy and policy-based framework for Kubernetes. Prior to 0.13.7, ForbiddenListSpec.ExactMatch in pkg/api/forbidden_list.go sorts denied metadata keys case-insensitively and then uses sort.SearchStrings, which assumes byte-order sorting. When an administrator's forbidden list mixes capitalized and lowercase keys or otherwise has different case-insensitive and byte ordering, the binary search can return false for a key that is present. An authenticated tenant owner can then pass the missed key through api.ValidateForbidden and bypass configured namespace, Service, or delegated node metadata restrictions, potentially influencing cluster policies, network exposure, or scheduling outside the tenant boundary. Uniformly lowercase lists whose two orderings coincide are not affected. This issue is fixed in version 0.13.7.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:N","score":7.1},"cwes":["CWE-697","CWE-863"],"references":["https://github.com/projectcapsule/capsule/commit/755cef54bf4a1bc56d6692130132bc70755bef46","https://github.com/projectcapsule/capsule/pull/1982","https://github.com/projectcapsule/capsule/releases/tag/v0.13.7","https://github.com/projectcapsule/capsule/security/advisories/GHSA-gjw4-3v3v-rqxg","https://github.com/projectcapsule/capsule/security/advisories/GHSA-gjw4-3v3v-rqxg"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-61672","score":0.00334,"percentile":0.26792,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-gjw4-3v3v-rqxg","url":"https://osv.dev/vulnerability/GHSA-gjw4-3v3v-rqxg","summary":"Capsule: Tenant owner bypasses Capsule's forbidden namespace/service/node label and annotation enforcement","modified":"2026-09-28T17:10:41.769858438Z","packages":[{"ecosystem":"Go","name":"github.com/projectcapsule/capsule","purl":"pkg:golang/github.com/projectcapsule/capsule","ranges":["<0.13.7"],"fixed":["0.13.7"]}]},{"id":"GO-2026-6520","url":"https://osv.dev/vulnerability/GO-2026-6520","summary":"Capsule: Tenant owner bypasses Capsule's forbidden namespace/service/node label and annotation enforcement in github.com/projectcapsule/capsule","modified":"2026-09-28T17:00:16.354051Z","packages":[{"ecosystem":"Go","name":"github.com/projectcapsule/capsule","purl":"pkg:golang/github.com/projectcapsule/capsule","ranges":["<0.13.7"],"fixed":["0.13.7"]}]}],"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."]}