CVE-2026-39817
published 2026-05-07CVE-2026-39817: The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a…
PriorityP429medium5.9CVSS 3.1
AVLACLPRLUIRSCCNIHAN
EPSS
0.17%
6.7th percentile
The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| go_toolchain | cmd_go | < 1.25.10 | 1.25.10 |
| go_toolchain | cmd_go | >= 1.26.0-0 < 1.26.3 | 1.26.3 |
| golang | go | < 1.25.10 | 1.25.10 |
| golang | go | >= 1.26.0 < 1.26.3 | 1.26.3 |
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VulDB
cmd-go up to 1.25.9/1.26.2 on Go Archive path traversal (EUVD-2026-28421)
vuldb·2026-05-07
CVE-2026-39817 [CRITICAL] cmd-go up to 1.25.9/1.26.2 on Go Archive path traversal (EUVD-2026-28421)
A vulnerability, which was classified as critical, was found in cmd-go up to 1.25.9/1.26.2 on Go. Affected by this vulnerability is an unknown functionality of the component Archive Handler. The manipulation results in path traversal.
This vulnerability is cataloged as CVE-2026-39817. The attack may be launched remotely. There is no exploit available.
You should upgrade the affected component.
GHSA
GHSA-qc64-m6c2-v4x7: The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames
ghsa_unreviewed·2026-05-07
CVE-2026-39817 [MEDIUM] GHSA-qc64-m6c2-v4x7: The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames
The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem.
No detection rules found.
No public exploits indexed.
2026-05-07
Published