Answer in brief
CVE-2026-62866 records a Medium severity (CVSS 6.2) vulnerability in Dasel: Selector lexer panics on trailing whitespace in `parseCurRune`. The current sources do not mark it as known exploited. The current feed maps TomWright/dasel (generic), github.com/tomwright/dasel (go), github.com/tomwright/dasel/v2 (go), github.com/tomwright/dasel/v3 (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps TomWright/dasel (generic), github.com/tomwright/dasel (go), github.com/tomwright/dasel/v2 (go), github.com/tomwright/dasel/v3 (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| TomWright/daselgeneric | >=3.0.0 <3.11.2 | 3.11.2 |
| github.com/tomwright/daselgo | >=0 | Not reported |
| github.com/tomwright/dasel/v2go | >=0 | Not reported |
| github.com/tomwright/dasel/v3go | >=3.0.0,<3.11.2 | 3.11.2 |
| github.com/tomwright/dasel/v3go | >=3.0.0 <3.11.2 | 3.11.2 |
Published upstream
Sep 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 21, 2026
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.
Quoted source text, attributed separately from HOL analysis.