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CVE-2026-46378— Dasel: Denial of service in dasel selector lexer due to infinite loop on unterminated regex literal

Quick assessment

Affected
TomWright dasel
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.

tomwright dasel是tomwright个人开发者开源的一个命令行数据查询与转换工具。 tomwright dasel 3.0.0版本至3.10.1之前版本存在资源管理错误漏洞，该漏洞源于selector lexer中matchRegexPattern闭包在解析未终止的正则表达式时循环，导致攻击者控制的字符串消耗CPU资源，造成拒绝服务。

CVSS 6.2 · Medium EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
TomWright dasel >= 3.0.0, < 3.10.1 affected
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I. Basic Information for CVE-2026-46378

Vulnerability Information
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Vulnerability Title
Dasel: Denial of service in dasel selector lexer due to infinite loop on unterminated regex literal
Source: CVE Program / CVE List V5
Vulnerability Description
Dasel is a command-line tool and library for querying, modifying, and transforming data structures. From 3.0.0 until 3.10.1, the selector lexer matchRegexPattern closure in (*Tokenizer).parseCurRune in selector/lexer/tokenize.go loops while tokenizing an unterminated regex literal such as r/ because peekRuneEqual returns false after the end of input, allowing attacker-controlled selector strings to consume CPU indefinitely. This issue is fixed in version 3.10.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
Vulnerability Title
tomwright dasel 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
tomwright dasel是tomwright个人开发者开源的一个命令行数据查询与转换工具。 tomwright dasel 3.0.0版本至3.10.1之前版本存在资源管理错误漏洞，该漏洞源于selector lexer中matchRegexPattern闭包在解析未终止的正则表达式时循环，导致攻击者控制的字符串消耗CPU资源，造成拒绝服务。
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
TomWright dasel >= 3.0.0, < 3.10.1 -

II. Public POCs for CVE-2026-46378

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III. Intelligence Information for CVE-2026-46378

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Patches & Fixes for CVE-2026-46378 (1)

Vendor Advisories for CVE-2026-46378 (1)

IV. Related Vulnerabilities

Same product: dasel
Same vendor: TomWright
Same weakness: CWE-835

V. Comments for CVE-2026-46378

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