CVE-2026-62866— Dasel: Selector lexer panics on trailing whitespace in `parseCurRune`
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.
Dasel is a command-line tool and library for querying, modifying, and transforming data structures. From 3.0.0 until 3.11.2, selector/lexer/tokenize.go parseCurRune advances the input index across trailing whitespace and then reads the source at the exhausted
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I. Basic Information for CVE-2026-62866
Vulnerability Information
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Vulnerability Title
Dasel: Selector lexer panics on trailing whitespace in `parseCurRune`
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 3.11.2, selector/lexer/tokenize.go parseCurRune advances the input index across trailing whitespace and then reads the source at the exhausted index without an end-of-input check. A selector ending in whitespace, including input passed through lexer.NewTokenizer(...).Tokenize() or dasel.Query, can therefore cause an index-out-of-range panic and terminate the process. This issue is fixed in version 3.11.2.
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
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-62866
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Patches & Fixes for CVE-2026-62866 (1)
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Merge commit from fork · TomWright/dasel@eee03ae · GitHub x_refsource_MISC
Other References for CVE-2026-62866 (2)
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Release v3.11.2 · TomWright/dasel · GitHub x_refsource_MISC
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V. Comments for CVE-2026-62866
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