CVE-2026-39817
Invoking "go tool pack" does not sanitize output paths in cmd/go
CVE-2026-39817 is fixed in 15 products on 2 platforms, first by Go Programming Language 1.26.3, released May 7, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
7.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0017
6th 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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Go Programming Language | 1.26.3 | Go Programming Language 1.26.3 | May 7, 2026 |
| Linux | |||
| delve · RHEL 8 | 0:1.25.2-1.module+el8.10.0+23746+9db33b5e | RHSA-2026:22112 | Jun 1, 2026 |
| delve · almalinux 8 | 1.25.2-1.module_el8.10.0+4074+24330916 | ALSA-2026:22112 | Jun 1, 2026 |
| delve · ol 8 | 0:1.25.2-1.0.1.module+el8.10.0+90715+2d4d8dfd | ELSA-2026-22112 | Jun 2, 2026 |
| delve · rocky 8 | 0:1.25.2-1.module+el8.10.0+40035+ee0a7047 | RLSA-2026:22112 | Aug 26, 2026 |
| go-toolset · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| go-toolset · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| go-toolset · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| go-toolset · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| go-toolset · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| go-toolset · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| go-toolset · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| go1.25-openssl · opensuse-leap 16.0 | 1.25.12-160000.1.1 | OPENSUSE-SU-2026:21319-1 | Jul 13, 2026 |
| go1.25-openssl · sles 16.0 | 1.25.12-160000.1.1 | SUSE-SU-2026:22638-1 | Jul 13, 2026 |
| go1.26-openssl · opensuse-leap 16.0 | 1.26.4-160000.1.1 | OPENSUSE-SU-2026:21254-1 | Jul 7, 2026 |
| go1.26-openssl · sles 16.0 | 1.26.4-160000.1.1 | SUSE-SU-2026:22572-1 | Jul 7, 2026 |
| golang · RHEL 10 | 1.26.5-1.el10_0 | RHSA-2026:49702 | May 27, 2026 |
| golang · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang · rocky 10 | 0:1.26.3-4.el10_2 | RLSA-2026:22120 | Aug 26, 2026 |
| golang · rocky 8 | 0:1.25.10-1.module+el8.10.0+40200+0fd0f175 | RLSA-2026:22112 | Aug 26, 2026 |
| golang · rocky 9 | 0:1.26.3-1.el9_8 | RLSA-2026:22121 | Aug 26, 2026 |
| golang-1.26 · Debian 14 | 1.26.3-1 | DEBIAN-CVE-2026-39817 | May 27, 2026 |
| golang-bin · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-bin · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-bin · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-bin · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-bin · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-bin · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-bin · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-bin · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-docs · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-docs · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-docs · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-docs · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-docs · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-docs · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-docs · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-docs · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-misc · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-misc · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-misc · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-misc · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-misc · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-misc · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-misc · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-misc · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-race · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-race · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-race · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-race · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-race · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-race · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-race · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-shared · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-src · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-src · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-src · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-src · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-src · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-src · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-src · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-src · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| golang-tests · RHEL 8 | 0:1.25.10-1.module+el8.10.0+24308+5c4a16b7 | RHSA-2026:22112 | Jun 1, 2026 |
| golang-tests · RHEL 9 | 0:1.26.3-1.el9_8 | RHSA-2026:22121 | Jun 1, 2026 |
| golang-tests · almalinux 8 | 1.25.10-1.module_el8.10.0+4187+c45165c4 | ALSA-2026:22112 | Jun 1, 2026 |
| golang-tests · almalinux 9 | 1.26.3-1.el9_8 | ALSA-2026:22121 | Jun 1, 2026 |
| golang-tests · amzn 2023 | 1.25.10-1.amzn2023.0.1 | ALAS2023-2026-1743 | May 25, 2026 |
| golang-tests · ol 10 | 0:1.26.5-1.0.1.el10_2 | ELSA-2026-22120 | Jul 21, 2026 |
| golang-tests · ol 8 | 0:1.25.9-1.0.1.module+el8.10.0+90898+1e3c34bb | ELSA-2026-22112 | Jun 2, 2026 |
| golang-tests · ol 9 | 0:1.26.3-1.0.1.el9_8 | ELSA-2026-22121 | Jun 23, 2026 |
| govulncheck-vulndb · opensuse-leap 16.0 | 0.0.20260723T184607-160000.1.1 | OPENSUSE-SU-2026:21483-1 | Jul 30, 2026 |
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