{"affected":[{"defaultStatus":"unaffected","ecosystem":"https://pkg.go.dev","packageName":"cmd/go","product":"cmd/go","source":"CNA: Go","vendor":"Go toolchain","versions":[{"lessThan":"1.26.11","status":"affected","version":"0","versionType":"semver"},{"lessThan":"1.27.4","status":"affected","version":"1.27.0-0","versionType":"semver"}]}],"cveId":"CVE-2026-97039","cwes":["CWE-88"],"description":"Building a malicious package that uses \"#cgo pkg-config:\" directives could load untrusted pkg-config \".pc\" files or inject unvalidated compiler and linker flags. The pkg-config flag allowlist previously permitted \"--with-path=\" and \"--personality=\", allowed \"--define-variable=\" values beginning with \"=\" or \"$\" (which can rewrite paths in system \".pc\" files into sysroot-prefixed \"-L=\" or \"-L$SYSROOT\" linker search paths), and allowed package arguments ending in \".pc\" or containing path separators or \"..\", which caused pkg-config to load local \".pc\" files directly from the package directory. In addition, flags returned by \"pkg-config --cflags\" in cgoCPPFLAGS were not checked when determining whether internal linking is safe. The go command now disallows \"--with-path=\", \"--personality=\", leading \"=\" or \"$\" characters in \"--define-variable=\" values, and local \".pc\" paths in \"#cgo pkg-config:\" directives, and inspects cgoCPPFLAGS when checking internal linking compatibility.","epss":null,"exploits":[],"kev":null,"metrics":[],"modifiedAt":1794366795684,"publishedAt":1794366795684,"references":[{"source":"CNA: Go","tags":[],"url":"https://go.dev/cl/862152"},{"source":"CNA: Go","tags":[],"url":"https://go.dev/issue/82571"},{"source":"CNA: Go","tags":[],"url":"https://groups.google.com/g/golang-announce/c/iY8TY0wWgbM"},{"source":"CNA: Go","tags":[],"url":"https://pkg.go.dev/vuln/GO-2026-6852"}],"remediation":[],"revision":"754666ab6b3a75ab64d78b1ecc0f46e2dfe3a53fa51538608c053d0c0187eb58","sources":[{"modifiedAt":1794366795684,"name":"CNA: Go","retrievedAt":1794370197990,"url":"https://www.cve.org/CVERecord?id=CVE-2026-97039"}],"ssvc":null,"status":"published","title":"Flag sanitization bypass via \"#cgo pkg-config:\" directives in cmd/go","updatedAt":1794370197990}