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Roland Shoemaker e9d2c032b1 [release-branch.go1.23] cmd/go: disable support for multiple vcs in one module 
Removes the somewhat redundant vcs.FromDir, "allowNesting" argument,
which was always enabled, and disallow multiple VCS metadata folders
being present in a single directory. This makes VCS injection attacks
much more difficult.

Also adds a GODEBUG, allowmultiplevcs, which re-enables this behavior.

Thanks to RyotaK (https://ryotak.net) of GMO Flatt Security Inc for
reporting this issue.

Updates #74380
Fixes #74382
Fixes CVE-2025-4674

Change-Id: I2db79f2baacfacfec331ee7c6978c4057d483eba
Reviewed-on: https://go-review.googlesource.com/c/go/+/686337
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Commit-Queue: Carlos Amedee <carlos@golang.org>
2025-07-08 09:29:10 -07:00
.github .github/ISSUE_TEMPLATE/03-gopls.yml: use textarea for gopls version 2024-05-24 17:09:04 +00:00
api crypto/tls: apply QUIC session event flag to QUICResumeSession events 2024-06-25 17:08:08 +00:00
doc [release-branch.go1.23] cmd/go: disable support for multiple vcs in one module 2025-07-08 09:29:10 -07:00
lib/time lib/time: use consistent directory in mkzip usage message 2024-03-04 17:32:07 +00:00
misc misc/ios: rework exec wrapper to only support simulator 2024-06-18 16:32:49 +00:00
src [release-branch.go1.23] cmd/go: disable support for multiple vcs in one module 2025-07-08 09:29:10 -07:00
test [release-branch.go1.23] cmd/compile: do nil check before calling duff functions, on arm64 and amd64 2025-06-11 20:49:18 -07:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/platform,cmd/dist: export the list of supported platforms 2023-06-22 19:44:52 +00:00
codereview.cfg [release-branch.go1.23] update codereview.cfg for release-branch.go1.23 2024-06-18 21:25:28 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
PATENTS LICENSE: separate, change PATENTS text 2010-12-06 16:31:59 -05:00
README.md README: fix CC BY license name 2024-07-22 17:45:27 +00:00
SECURITY.md SECURITY.md: update the Reporting a Vulnerability link 2023-09-22 21:17:24 +00:00
VERSION [release-branch.go1.23] go1.23.10 2025-06-05 11:34:47 -07:00

README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

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