Unexpected paths returned from LookPath in os/exec

GO-2025-3956 · BIT-golang-2025-47906 · CVE-2025-47906

Published Sep 18, 2025 · Modified Feb 4, 2026

Description

If the PATH environment variable contains paths which are executables (rather than just directories), passing certain strings to LookPath ("", ".", and ".."), can result in the binaries listed in the PATH being unexpectedly returned.

References

FIX https://go.dev/cl/691775
REPORT https://go.dev/issue/74466
WEB https://groups.google.com/g/golang-announce/c/x5MKroML2yM

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