VulnerabilityModified
CVE-2026-27140
SWIG file names containing 'cgo' and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.
HIGH 8.8EPSS 0.66%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.66%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
SWIG file names containing 'cgo' and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.66% probability · 50th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863, CWE-641
- Affected
- golang/go
- Source
- security@golang.org
References
- https://go.dev/cl/763768Release Notes
- https://go.dev/issue/78335Issue Tracking
- https://groups.google.com/g/golang-announce/c/0uYbvbPZRWUMailing List, Release Notes
- https://pkg.go.dev/vuln/GO-2026-4871Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:10217
- https://access.redhat.com/errata/RHSA-2026:10219
- https://access.redhat.com/errata/RHSA-2026:10704
- https://access.redhat.com/errata/RHSA-2026:16021
- https://access.redhat.com/errata/RHSA-2026:16024
- https://access.redhat.com/errata/RHSA-2026:16494
- https://access.redhat.com/errata/RHSA-2026:16497
- https://access.redhat.com/errata/RHSA-2026:16498
- https://access.redhat.com/errata/RHSA-2026:16694
- https://access.redhat.com/errata/RHSA-2026:16697
- https://access.redhat.com/errata/RHSA-2026:16698
- https://access.redhat.com/errata/RHSA-2026:23246
- https://access.redhat.com/errata/RHSA-2026:25182
- https://access.redhat.com/errata/RHSA-2026:34099
- https://access.redhat.com/errata/RHSA-2026:56854
- https://access.redhat.com/errata/RHSA-2026:57408
- https://access.redhat.com/errata/RHSA-2026:57545
- https://access.redhat.com/security/cve/CVE-2026-27140
- https://bugzilla.redhat.com/show_bug.cgi?id=2456341
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27140.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.