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CVE-2026-97042VulnerabilityPublished

Building a malicious package that uses "//go:cgo_import_dynamic" or links against a crafted PE object on Windows could

Source GCVE Database

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Authoritative record:CVE-2026-97042· High

Not known to be exploited : upgrade to 1.27.4 or 1.26.11 soon.

Data as of 11 Nov 2026, 07:48 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 1.27.4, 1.26.11

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade cmd/cgo and cmd/compile and cmd/link to 1.27.4 or 1.26.11.

Affected software

ProductAffectedFixed in
Go toolchaincmd/cgoAffected
  • >=1.27.0-0 <1.27.4
Fixed in
  • 1.27.4
Go toolchaincmd/cgoAffected
  • <1.26.11
Fixed in
  • 1.26.11
Go toolchaincmd/compileAffected
  • >=1.27.0-0 <1.27.4
Fixed in
  • 1.27.4
Go toolchaincmd/compileAffected
  • <1.26.11
Fixed in
  • 1.26.11
Go toolchaincmd/linkAffected
  • >=1.27.0-0 <1.27.4
Fixed in
  • 1.27.4
Go toolchaincmd/linkAffected
  • <1.26.11
Fixed in
  • 1.26.11

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

The vulnerability has been addressed by enhancing validation in the Go compiler and linker. The compiler now validates every character of library names in "//go:cgo_import_dynamic" directives, including cgo-generated files on Windows, rejecting path traversal sequences and unsafe characters. Similarly, "cmd/cgo" and "cmd/link" reject PE imported DLL names containing path separators, "..", ":", or leading "-" or "@". Users should update to the fixed versions of the Go toolchain once available.

Description

A vulnerability in the Go compiler and linker on Windows allows malicious packages using "//go:cgo_import_dynamic" directives or crafted PE objects to pass unsafe library arguments to the external linker. The issue arises because the compiler previously only checked the first character of library names and did not validate imported DLL names extracted from PE files, enabling path traversal and special character injection. The compiler and linker now fully validate library names and reject unsafe characters and path traversal sequences.

References

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