Back to CVE records
Medium 5.9Published May 7, 2026
CVE-2026-39817The "go tool pack" subcommand (usually used only by the compiler as an internal tool with known-good inputs) does not sanitize output filenames.
Updated under an hour ago ()
Does this affect you?
It affects golang go. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Start free and add your stack
Free account, 1 product
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.
- CVSS
- 5.9 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
golang go golang:go | before 1.25.10; from 1.26.0 before 1.26.3 | NVD |
References
- https://go.dev/cl/767520patch
- https://go.dev/issue/78778issue-tracking
- https://groups.google.com/g/golang-announce/c/qcCIEXso47Missue-tracking, mailing-list
- https://pkg.go.dev/vuln/GO-2026-4979vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.