BIT-golang-2026-39817

vendorUSosv

Invoking "go tool pack" does not sanitize output paths in cmd/go

view advisory published 2026-05-11Licence: per source

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-39817US	medium5.9	0.17% (6th)	—	2026-05-07
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…

references

External citations — patches, advisories, analysis.

https://go.dev/cl/767520FIX
https://go.dev/issue/78778REPORT
https://groups.google.com/g/golang-announce/c/qcCIEXso47MREPORT
https://nvd.nist.gov/vuln/detail/CVE-2026-39817WEB
https://pkg.go.dev/vuln/GO-2026-4979ADVISORY

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