What’s Vulnerable › Vulnerabilities

CVE-2026-62866: Dasel: Selector lexer panics on trailing whitespace in `parseCurRune`

• Severity: medium (CVSS 6.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-21 · updated 2026-09-24
• Weakness: CWE-129

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.

Affected products

• TomWright dasel: from 3.0.0, < 3.11.2

References

• https://github.com/TomWright/dasel/commit/eee03aec28d4a33d6138098d065b7b37b85e3c55
• https://github.com/TomWright/dasel/releases/tag/v3.11.2
• https://github.com/TomWright/dasel/security/advisories/GHSA-65gg-g7rw-6cpc
• https://github.com/TomWright/dasel/security/advisories/GHSA-65gg-g7rw-6cpc

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