{"id":"CVE-2026-97033","published":"2026-11-11T05:19:57.253","lastModified":"2026-11-11T05:19:57.253","description":"Building a malicious package that uses cgo could cause arbitrary code execution at build time through several compiler and linker flags permitted in \"#cgo\" directives. Specifically, \"--sysroot\" in GCC and Clang relocates compiler subprograms, spec files, and CRT startup objects to an attacker-controlled directory; \"-target\" in Clang falls back to executing target helper tools from the current working directory when not found in PATH; \"-isysroot\" and \"-Wl,-syslibroot\" can pass a regular file on disk to GNU ld.bfd, which interprets it as a positional linker script; and \"-x\" permitted specifying arbitrary compiler input languages beyond those supported by cgo. \"--sysroot\" and \"-target\" are now disallowed in \"#cgo\" flags, \"-isysroot\" and \"-Wl,-syslibroot\" are verified not to point to regular files, and \"-x\" is restricted to the C, C++, Objective-C, and assembler languages supported by cgo.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://go.dev/cl/862146","tags":[]},{"url":"https://go.dev/issue/82577","tags":[]},{"url":"https://groups.google.com/g/golang-announce/c/iY8TY0wWgbM","tags":[]},{"url":"https://pkg.go.dev/vuln/GO-2026-6858","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}