Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-35346— uutils coreutils comm Silent Data Corruption via Lossy UTF-8 Normalization

Quick assessment

Affected
Uutils coreutils
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.

uutils coreutils是Uutils开源的一个跨平台核心命令行工具集。 uutils coreutils存在安全漏洞，该漏洞源于comm实用程序通过对所有输出行执行有损UTF-8转换来静默损坏数据，实现使用String::from_utf8_lossy，将无效UTF-8字节序列替换为Unicode替换字符，此行为与处理原始字节并保留原始输入的GNU comm不同，当实用程序用于比较二进制文件或使用非UTF-8遗留编码的文件时，会导致输出损坏。

CVSS 3.3 · Low EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-35346

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
uutils coreutils comm Silent Data Corruption via Lossy UTF-8 Normalization
Source: CVE Program / CVE List V5
Vulnerability Description
The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines. The implementation uses String::from_utf8_lossy(), which replaces invalid UTF-8 byte sequences with the Unicode replacement character (U+FFFD). This behavior differs from GNU comm, which processes raw bytes and preserves the original input. This results in corrupted output when the utility is used to compare binary files or files using non-UTF-8 legacy encodings.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
Unicode编码处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
uutils coreutils 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
uutils coreutils是Uutils开源的一个跨平台核心命令行工具集。 uutils coreutils存在安全漏洞，该漏洞源于comm实用程序通过对所有输出行执行有损UTF-8转换来静默损坏数据，实现使用String::from_utf8_lossy，将无效UTF-8字节序列替换为Unicode替换字符，此行为与处理原始字节并保留原始输入的GNU comm不同，当实用程序用于比较二进制文件或使用非UTF-8遗留编码的文件时，会导致输出损坏。
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
Uutils coreutils 0 ~ 0.6.0 -

II. Public POCs for CVE-2026-35346

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-35346

请登录查看更多情报信息。

Same Patch Batch · Uutils · 2026-04-22 · 44 CVEs total

CVE-2026-35338 7.3 HIGH uutils coreutils chmod Path Traversal Bypass of --preserve-root
CVE-2026-35368 7.2 HIGH uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service S
CVE-2026-35341 7.1 HIGH uutils coreutils mkfifo Unauthorized Permission Change on Existing Files
CVE-2026-35352 7.0 HIGH uutils coreutils mkfifo Privilege Escalation via TOCTOU Race Condition
CVE-2026-35349 6.7 MEDIUM uutils coreutils Path-Based Safety Bypass with --preserve-root
CVE-2026-35365 6.6 MEDIUM uutils coreutils mv Denial of Service and Data Duplication via Improper Symlink Expansion
CVE-2026-35350 6.6 MEDIUM uutils coreutils cp Unexpected Privileged Executable Creation with -p
CVE-2026-35364 6.3 MEDIUM uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition
CVE-2026-35355 6.3 MEDIUM uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race
CVE-2026-35360 6.3 MEDIUM uutils coreutils touch Arbitrary File Truncation via TOCTOU Race Condition
CVE-2026-35356 6.3 MEDIUM uutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink Race
CVE-2026-35374 6.3 MEDIUM uutils coreutils split Arbitrary File Truncation via Time-of-Check to Time-of-Use (TOCTOU)
CVE-2026-35363 5.6 MEDIUM uutils coreutils rm Safeguard Bypass via Improper Path Normalization
CVE-2026-35380 5.5 MEDIUM uutils coreutils cut Local Logic Error and Data Integrity Issue in Delimiter Parsing
CVE-2026-35340 5.5 MEDIUM uutils coreutils chown and chgrp False Success Exit Code in Recursive Mode
CVE-2026-35348 5.5 MEDIUM uutils coreutils sort Local Denial of Service via Forced UTF-8 Parsing
CVE-2026-35369 5.5 MEDIUM uutils coreutils kill System-wide Process Termination and Denial of Service via Argument M
CVE-2026-35339 5.5 MEDIUM uutils coreutils chmod False Success Exit Code in Recursive Mode
CVE-2026-35345 5.3 MEDIUM uutils coreutils tail Privileged Information Disclosure via Symlink Replacement Race
CVE-2026-35372 5.0 MEDIUM uutils coreutils ln Security Bypass via Improper Handling of the --no-dereference Flag

Showing top 20 of 44 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: coreutils
Same vendor: Uutils
Same weakness: CWE-176