CVE-2025-11233

Starting from Rust 1.87.0 and before Rust 1.89.0, the tier 3 Cygwin target (x86_64-pc-cygwin) didn't correctly handle path separators, causing the standard library's Path API to ignore path components separated by backslashes. Due to this, programs compiled for Cygwin that validate paths could misbehave, potentially allowing path traversal attacks or malicious filesystem operations.

Rust 1.89.0 fixes the issue by handling both Win32 and Unix style paths in the standard library for the Cygwin target.

While we assess the severity of this vulnerability as "medium", please note that the tier 3 Cygwin compilation target is only available when building it from source: no pre-built binaries are distributed by the Rust project, and it cannot be installed through Rustup. Unless you manually compiled the x86_64-pc-cygwin target you are not affected by this vulnerability. Users of the tier 1 MinGW target (x86_64-pc-windows-gnu) are also explicitly not affected.

Database specific

{
    "cwe_ids": [
        "CWE-22"
    ],
    "cna_assigner": "rust",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/11xxx/CVE-2025-11233.json"
}

References

Affected packages

Git / github.com/rust-lang/rust

Affected ranges

Type

GIT

Repo

https://github.com/rust-lang/rust

Events

Introduced

17067e9ac6d7ecb70e50f92c1944e545188d2359

Fixed

29483883eed69d5fb4db01964cdf2af4d86e9cb2

Database specific

{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "1.87.0"
        },
        {
            "fixed": "1.89.0"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-11233.json"