CVE-2026-44471— gitoxide: Symlink prefix-reuse allows worktree escape during checkout

gitoxide: Symlink prefix-reuse allows worktree escape during checkout

gitoxide is an implementation of git written in Rust. Prior to 0.21.1, a malicious tree can be constructed that will, when checked out with gitoxide, permit writing an attacker-controlled symlink into any existing directory the user has write access to. During checkout, all symlink index entries are deferred and created after regular files using a single shared gix_worktree::Stack. Internally, this uses a gix_fs::Stack. gix_fs::Stack::make_relative_path_current() caches validated path prefixes: when the previously-processed leaf component exactly matches the leading component(s) of the next path, the leaf-to-directory transition at gix-fs/src/stack.rs invokes only delegate.push_directory(), never delegate.push(). In gix_worktree::stack::delegate::StackDelegate, when the state member is State::CreateDirectoryAndAttributesStack, Attributes::push_directory() only loads attributes (from the ODB, in the clone case), and does not perform any other checks. The on-disk symlink_metadata() check and unlink-on-collision live in StackDelegate::push()'s invocation of create_leading_directory(), which is therefore bypassed for the cached prefix. The final symlink is created with plain std::os::unix::fs::symlink, which follows symlinks in parent directories. Therefore, it's possible to provide a tree with duplicate symlink and directory entries that exploits this. This vulnerability is fixed in 0.21.1.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

在文件访问前对链接解析不恰当(链接跟随)

gitoxide 后置链接漏洞

gitoxide是Sebastian Thiel个人开发者的一个用 Rust 编写的 git 实现。 gitoxide 0.21.1之前版本存在后置链接漏洞，该漏洞源于检出过程中对符号链接索引条目的处理存在缺陷，可能导致攻击者构造恶意树，在用户可写目录中写入攻击者控制的符号链接。

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