{"cve":"CVE-2026-39830","nvd":{"published":"2026-05-22T04:16:22.440","modified":"2026-09-16T13:17:53.697","status":"Modified","description":"A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.","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:H","score":9.1},"cwes":["CWE-119","CWE-772"],"references":["https://go.dev/cl/781640","https://go.dev/cl/781664","https://go.dev/issue/79564","https://groups.google.com/g/golang-announce/c/a082jnz-LvI","https://pkg.go.dev/vuln/GO-2026-5017"],"products":["golang:crypto"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-39830","score":0.00683,"percentile":0.52545,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vgwf-h737-ff37","url":"https://osv.dev/vulnerability/GHSA-vgwf-h737-ff37","summary":"golang.org/x/crypto: Invoking client can cause server deadlock on unexpected responses","modified":"2026-09-15T12:45:34.863978347Z","packages":[{"ecosystem":"Go","name":"golang.org/x/crypto","purl":"pkg:golang/golang.org/x/crypto","ranges":["<0.52.0"],"fixed":["0.52.0"]}]},{"id":"GO-2026-5017","url":"https://osv.dev/vulnerability/GO-2026-5017","summary":"Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh","modified":"2026-09-23T10:41:39.176153896Z","packages":[{"ecosystem":"Go","name":"golang.org/x/crypto","purl":"pkg:golang/golang.org/x/crypto","ranges":["<0.52.0"],"fixed":["0.52.0"]}]}],"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."]}