CVE-2026-39819

UNKNOWN 0.0

Invoking "go bug" follows symlinks in predictable temporary filenames in cmd/go

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

The "go bug" command writes to two files with predictable names in the system temporary directory (for example, "/tmp"). An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink.

Vendor	go toolchain
Product	cmd/go
Published	May 7, 2026

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Affected Versions

Go toolchain / cmd/go

0 < 1.25.10 1.26.0-0 < 1.26.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

go.dev: https://go.dev/issue/78584 go.dev: https://go.dev/cl/763882 groups.google.com: https://groups.google.com/g/golang-announce/c/qcCIEXso47M pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-4978

Credits

Harshit Gupta (Mr HAX)