CVE-2026-39819

Published: May 7, 2026

Modified: May 8, 2026

PUBLISHED

Description

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	Product	Versions
Go toolchain	cmd/go	affected `0 - < 1.25.10` affected `1.26.0-0 - < 1.26.3`

References

https://go.dev/issue/78584

https://go.dev/cl/763882

https://groups.google.com/g/golang-announce/c/qcCIEXso47M

https://pkg.go.dev/vuln/GO-2026-4978

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CVE-2026-39819

Description

Affected Products

References