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CVE-2026-100866— onefetch through 2.28.1 Terminal Escape Sequence Injection

Quick assessment

Affected
o2sh onefetch
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.

onefetch 2.28.1 及更早版本在将仓库信息字段值写入终端时，未移除控制字符，从而导致终端转义序列注入漏洞。攻击者可以在项目的清单版本和名称字段中嵌入 ANSI/OSC 转义序列，从而在受害者运行 onefetch 时操控终端输出、重写窗口标题、隐藏文本或触发特定终端模拟器的行为。

CVSS 3.3 · Low EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1608 · Stage Capabilities

Affected Version Matrix 1

VendorProduct Version RangeStatus
o2sh onefetch ≤ 2.28.1 affected
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I. Basic Information for CVE-2026-100866

Vulnerability Information
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Vulnerability Title
onefetch through 2.28.1 Terminal Escape Sequence Injection
Source: CVE Program / CVE List V5
Vulnerability Description
onefetch through 2.28.1 writes repository information field values to the terminal without removing control characters, allowing terminal escape sequence injection. Attackers can embed ANSI/OSC escape sequences in project manifest version and name fields to manipulate terminal output, rewrite window titles, hide text, or trigger emulator-specific behavior when victims run onefetch.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
转义、元或控制序列转义处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
o2sh onefetch 0 ~ 2.28.1 -

II. Public POCs for CVE-2026-100866

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III. Intelligence Information for CVE-2026-100866

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Patches & Fixes for CVE-2026-100866 (2)

Vendor Advisories for CVE-2026-100866 (1)

Other References for CVE-2026-100866 (1)

IV. Related Vulnerabilities

Same weakness: CWE-150

V. Comments for CVE-2026-100866

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