CVE-2026-39819
5.3
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Go toolchain | cmd/go | 0 < 1.25.10 | affected |
| Go toolchain | cmd/go | 1.26.0-0 < 1.26.3 | affected |
Weaknesses
- CWE-377: Insecure Temporary File
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
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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