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CVE-2026-39819 Moderate

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

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.

Exploit probability 0.2%
Published May 11, 2026
Required by Not available
Last source change May 11, 2026

02 / AFFECTED SOFTWARE

Affected packages

Unknown Unknown

152 explicit affected versions

Go toolchain
Bitnami golang

03 / CONNECTIONS

Connected vulnerabilities

related OPENSUSE-SU-2026:21483-1
related RHSA-2026:22112
related RHSA-2026:22120
related RHSA-2026:22121
related RHSA-2026:49702
related RHSA-2026:49712
related RHSA-2026:57649
related RHSA-2026:61253

04 / EVIDENCE

Source records

Open Source Vulnerabilities CVE-2026-39819

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.

View original source
Open Source Vulnerabilities BIT-golang-2026-39819

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.

View original source
Open Source Vulnerabilities GO-2026-4978

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.

View original source

05 / REFERENCES

Further evidence