CVE-2026-39819
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductGo
PublishedMay 7, 2026
First seenMay 7, 2026
Weakness typeCWE-377CWE-377
How to fix
Update
- golang go1.25.10, 1.26.3 or later
- toolchain1.25.10, 1.26.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang go | v < 1.25.10, 1.26.0 ≤ v < 1.26.3 | 1.25.10, 1.26.3 |
| toolchainGo | v < 1.25.10, 1.26.0-0 ≤ v < 1.26.3 | 1.25.10, 1.26.3 |
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