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CVE-2025-11233— Rust standard library didn't detect all path separators on Cygwin

Quick assessment

Affected
Rust Project std
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rust是美国Mozilla基金会的一款通用、编译型编程语言。 Rust 1.87.0版本至1.89.0之前版本存在安全漏洞，该漏洞源于路径分隔符处理不当，可能导致路径遍历攻击或恶意文件系统操作。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.52% · P42
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I. Basic Information for CVE-2025-11233

Vulnerability Information
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Vulnerability Title
Rust standard library didn't detect all path separators on Cygwin
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/AU:Y/RE:L/U:Green
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Rust 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rust是美国Mozilla基金会的一款通用、编译型编程语言。 Rust 1.87.0版本至1.89.0之前版本存在安全漏洞，该漏洞源于路径分隔符处理不当，可能导致路径遍历攻击或恶意文件系统操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Rust Project std 1.87.0 ~ 1.89.0 -

II. Public POCs for CVE-2025-11233

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III. Intelligence Information for CVE-2025-11233

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Patches & Fixes for CVE-2025-11233 (1)

Vendor Advisories for CVE-2025-11233 (1)

IV. Related Vulnerabilities

Same product: std
Same vendor: Rust Project
Same weakness: CWE-22

V. Comments for CVE-2025-11233

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