CVE-2026-62866: Tomwright Dasel

Medium severity, CVSS 6.2. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Tomwright Dasel: from 3.0.0, before 3.11.2 (fixed in 3.11.2)

Published 2026-09-21. Last modified 2026-09-24.