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CVE-2026-54417— Integer Overflow in rxi/microtar mtar_next() Causes Infinite Loop DoS

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的嵌入式Web服务器。 rxi microtar 0.1.0版本存在安全漏洞，该漏洞源于mtar_next()函数中存在整数溢出，可能导致远程攻击者通过特制tar档案造成拒绝服务（CPU消耗/无限循环）。

CVSS 7.5 · High EPSS 0.75% · P54

Affected Version Matrix 1

VendorProduct Version RangeStatus
rxi microtar 0.1.0 affected
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I. Basic Information for CVE-2026-54417

Vulnerability Information
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Vulnerability Title
Integer Overflow in rxi/microtar mtar_next() Causes Infinite Loop DoS
Source: CVE Program / CVE List V5
Vulnerability Description
An integer overflow in the mtar_next function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtar_next computes the offset to the next record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
rxi microtar 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rxi microtar是rxi的嵌入式Web服务器。 rxi microtar 0.1.0版本存在安全漏洞，该漏洞源于mtar_next()函数中存在整数溢出，可能导致远程攻击者通过特制tar档案造成拒绝服务（CPU消耗/无限循环）。
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 0.1.0 -

II. Public POCs for CVE-2026-54417

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8895 chars
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Trigger conditions & impact
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III. Intelligence Information for CVE-2026-54417

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Patches & Fixes for CVE-2026-54417 (1)

Other References for CVE-2026-54417 (1)

IV. Related Vulnerabilities

Same product: microtar
Same vendor: rxi
Same weakness: CWE-190

V. Comments for CVE-2026-54417

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