{"cve":"CVE-2026-78662","nvd":{"published":"2026-09-02T20:17:37.167","modified":"2026-09-04T16:33:34.057","status":"Analyzed","description":"Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-770"],"references":["https://go.dev/cl/826504","https://go.dev/issue/81316","https://groups.google.com/g/golang-announce/c/1y3fb2np35U","https://pkg.go.dev/vuln/GO-2026-6354"],"products":["golang:crypto"],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-78662","score":0.00431,"percentile":0.37397,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GO-2026-6354","url":"https://osv.dev/vulnerability/GO-2026-6354","summary":"Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh","modified":"2026-09-03T10:10:55.147673102Z","packages":[{"ecosystem":"Go","name":"golang.org/x/crypto","purl":"pkg:golang/golang.org/x/crypto","ranges":["<0.56.0"],"fixed":["0.56.0"]}]}],"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."]}