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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-71267— microtar Stack Buffer Overflow in mtar_write_file_header() and mtar_write_dir_header()

Quick assessment

Affected
rxi microtar
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

rxi microtar是rxi个人开发者的一个提供tar格式读写功能的微型库。 rxi microtar存在缓冲区错误漏洞，该漏洞源于src/microtar.c文件中的mtar_write_file_header()和mtar_write_dir_header()函数通过strcpy将调用者提供的条目名称复制到100字节name字段，未检查strlen(name)是否小于100，可能导致栈缓冲区溢出。

CVSS 9.8 · Critical EPSS 0.55% · P45

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
rxi microtar ≤ * affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-71267

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
microtar Stack Buffer Overflow in mtar_write_file_header() and mtar_write_dir_header()
Source: CVE Program / CVE List V5
Vulnerability Description
microtar's mtar_write_file_header and mtar_write_dir_header functions (src/microtar.c) copy a caller-supplied entry name into the 100-byte field of a stack-allocated mtar_header_t via strcpy(h.name, name), with no check that strlen(name) is less than 100 before the copy.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
rxi microtar 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rxi microtar是rxi个人开发者的一个提供tar格式读写功能的微型库。 rxi microtar存在缓冲区错误漏洞，该漏洞源于src/microtar.c文件中的mtar_write_file_header()和mtar_write_dir_header()函数通过strcpy将调用者提供的条目名称复制到100字节name字段，未检查strlen(name)是否小于100，可能导致栈缓冲区溢出。
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
rxi microtar 0 ~ * -

II. Public POCs for CVE-2026-71267

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11204 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-71267

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-71267 (1)

IV. Related Vulnerabilities

Same product: microtar
Same vendor: rxi
Same weakness: CWE-121

V. Comments for CVE-2026-71267

No comments yet

Leave a comment