CVE-2026-62866

6.2 MEDIUMpublic exploit available

Published 2026-09-21 · Updated 2026-09-24

AI risk analysis

Summary: The flaw in Dasel allows an attacker to cause a panic due to index-out-of-range errors by providing input ending in whitespace. This matters because it can lead to service disruption.
Exploitability: Exploitation is moderately easy if an attacker can control the input, requiring knowledge of the specific whitespace pattern that triggers the issue.
Blast radius: If exploited, this could potentially disrupt services using Dasel, but the impact is limited to those applications and environments where untrusted input is processed without proper validation.
Prioritized remediation: Update to Dasel version 3.11.2 or later to mitigate the risk of index-out-of-range panics.

denial-of-serviceinput-validationlibrary-vulnerability

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CWE-129

Public exploit & PoC references

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.