Dasel: Denial of service in dasel selector lexer due to infinite loop on unterminated regex literal

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-46378
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-16 19:16:46 UTC
Updated2026-07-17 18:36:41 UTC
DescriptionDasel is a command-line tool and library for querying, modifying, and transforming data structures. From 3.0.0 until 3.10.1, the selector lexer matchRegexPattern closure in (*Tokenizer).parseCurRune in selector/lexer/tokenize.go loops while tokenizing an unterminated regex literal such as r/ because peekRuneEqual returns false after the end of input, allowing attacker-controlled selector strings to consume CPU indefinitely. This issue is fixed in version 3.10.1.

Risk And Classification

Primary CVSS: v3.1 6.2 MEDIUM from [email protected]

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

EPSS: 0.001120000 probability, percentile 0.016420000 (date 2026-07-20)

Problem Types: CWE-835 | CWE-835 CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED6.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TomWright Dasel affected >= 3.0.0, < 3.10.1 Not specified

References

ReferenceSourceLinkTags
github.com/TomWright/dasel/security/advisories/GHSA-m6xr-fvfg-5g64 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/TomWright/dasel/commit/95f8dd3af12958bf6ca2a737b3ec0267280f86ed [email protected] github.com
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