{"cve":"CVE-2026-39817","nvd":{"published":"2026-05-07T20:16:42.983","modified":"2026-06-17T10:42:37.910","status":"Analyzed","description":"The \"go tool pack\" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a malicious archive file with the \"pack\" subcommand can write files to arbitrary locations on the filesystem.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N","score":5.9},"cwes":["CWE-787"],"references":["https://go.dev/cl/767520","https://go.dev/issue/78778","https://groups.google.com/g/golang-announce/c/qcCIEXso47M","https://pkg.go.dev/vuln/GO-2026-4979"],"products":["golang:go"],"source":"nvd","synced_at":"2026-10-19T22:33:55.586217763+00:00"},"epss":{"cve":"CVE-2026-39817","score":0.0017,"percentile":0.06351,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GO-2026-4979","url":"https://osv.dev/vulnerability/GO-2026-4979","summary":"Invoking \"go tool pack\" does not sanitize output paths in cmd/go","modified":"2026-09-22T10:41:48.476924269Z","packages":[{"ecosystem":"Go","name":"toolchain","purl":"pkg:golang/toolchain","ranges":["<1.25.10",">=1.26.0-0 <1.26.3"],"fixed":["1.25.10","1.26.3"]}]}],"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."]}