{"cve":"CVE-2026-45720","nvd":{"published":"2026-09-17T20:16:49.190","modified":"2026-09-24T21:25:27.050","status":"Deferred","description":"Omni manages Kubernetes on bare metal, virtual machines, or in a cloud. Prior to 1.6.6 and from 1.7.0 until 1.7.3, SAML.getSession in internal/pkg/auth/interceptor/saml.go checks SAMLAssertion.Used and marks it used in separate state operations. Concurrent requests carrying the same captured saml-session token can each observe the assertion as unused and obtain authentication as the victim before either update is visible. The attacker can invoke SAML-protected gRPC endpoints, use ConfirmPublicKey to create multiple persistent credentials tied to the victim, and generate audit entries attributed to the victim, with the resulting access potentially affecting confidentiality, integrity, and availability according to the victim's privileges. This issue is fixed in versions 1.6.6 and 1.7.3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.0},"cwes":["CWE-294","CWE-367"],"references":["https://github.com/siderolabs/omni/commit/272d3f4dd00e778b39fde09afde35575fe13ef13","https://github.com/siderolabs/omni/commit/4c4c1e2d8226914f26774a309a91595f168ee921","https://github.com/siderolabs/omni/commit/ced79da6c032d2103803eb53343d0916cc957d2a","https://github.com/siderolabs/omni/pull/2816","https://github.com/siderolabs/omni/releases/tag/v1.6.6"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-45720","score":0.00143,"percentile":0.0358,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-5x9f-6vg5-qg4m","url":"https://osv.dev/vulnerability/GHSA-5x9f-6vg5-qg4m","summary":"Omni has a TOCTOU race condition that allows multiple concurrent uses of a single-use SAML session token","modified":"2026-06-25T18:56:27.446022852Z","packages":[{"ecosystem":"Go","name":"github.com/siderolabs/omni","purl":"pkg:golang/github.com/siderolabs/omni","ranges":["<1.6.6"],"fixed":["1.6.6"]},{"ecosystem":"Go","name":"github.com/siderolabs/omni","purl":"pkg:golang/github.com/siderolabs/omni","ranges":[">=1.7.0 <1.7.3"],"fixed":["1.7.3"]}]},{"id":"GO-2026-5160","url":"https://osv.dev/vulnerability/GO-2026-5160","summary":"Omni has a TOCTOU race condition that allows multiple concurrent uses of a single-use SAML session token in github.com/siderolabs/omni","modified":"2026-06-25T18:45:13.497235708Z","packages":[{"ecosystem":"Go","name":"github.com/siderolabs/omni","purl":"pkg:golang/github.com/siderolabs/omni","ranges":["<1.6.6",">=1.7.0 <1.7.3"],"fixed":["1.6.6","1.7.3"]}]}],"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."]}