{"cve":"CVE-2025-68121","nvd":{"published":"2026-02-05T18:16:10.857","modified":"2026-06-17T09:58:33.833","status":"Modified","description":"During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":10.0},"cwes":["CWE-295"],"references":["https://go.dev/cl/737700","https://go.dev/issue/77217","https://groups.google.com/g/golang-announce/c/K09ubi9FQFk","https://pkg.go.dev/vuln/GO-2026-4337"],"products":["golang:go"],"source":"nvd","synced_at":"2026-10-19T22:22:27.261130201+00:00"},"epss":{"cve":"CVE-2025-68121","score":0.00902,"percentile":0.59731,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GO-2026-4337","url":"https://osv.dev/vulnerability/GO-2026-4337","summary":"Unexpected session resumption in crypto/tls","modified":"2026-09-29T10:56:43.193415299Z","packages":[{"ecosystem":"Go","name":"stdlib","purl":"pkg:golang/stdlib","ranges":["<1.24.13",">=1.25.0-0 <1.25.7",">=1.26.0-rc.1 <1.26.0-rc.3"],"fixed":["1.24.13","1.25.7","1.26.0-rc.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."]}