TI-2026-44930 Aliases CVE-2026-62866 GHSA-65gg-g7rw-6cpc

Dasel: Selector lexer panics on trailing whitespace in `parseCurRune`

MEDIUM 61CWE-129Published 2026-09-21 · Updated 2026-09-21

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-129 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00192 8th percentileScored 2026-11-07

Fix Fixed dasel (TomWright): 3.11.2github.com/tomwright/dasel/v3 (Go): 3.11.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
TomWright	dasel	3.0.0 to before 3.11.2	3.11.2	Patch available	CNA
—	github.com/tomwright/dasel/v3 (Go)	3.0.0 to before 3.11.2	3.11.2	Patch available	GHSA-65gg-g7rw-6cpc

dasel VendorTomWright Affected 3.0.0 to before 3.11.2 Fixed in 3.11.2 Patch available CNA
github.com/tomwright/dasel/v3 (Go) Vendor— Affected 3.0.0 to before 3.11.2 Fixed in 3.11.2 Patch available GHSA-65gg-g7rw-6cpc

Remediation

Fix · CNA dasel (TomWright) Fixed in 3.11.2
Fix · GHSA-65gg-g7rw-6cpc github.com/tomwright/dasel/v3 (Go) Fixed in 3.11.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-62866
2026-10-03 Alias added: GHSA-65gg-g7rw-6cpc

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-62866

Other 4

TI-2026-34094 Dasel: Denial of service in dasel selector lexer due to infinite loop on unterminated regex literal CVSS 3.1MEDIUM 6.2
TI-2026-34093 Dasel: Index-out-of-range panic in dasel selector lexer on trailing backslash in quoted string CVSS 3.1MEDIUM 6.2
TI-2026-25731 Dasel has unbounded YAML alias expansion in dasel leads to CPU/memory denial of service CVSS 3.1MEDIUM 6.2
TI-2026-42329 Dasel: Unbounded recursion in JSON and XML readers causes unrecoverable stack-overflow DoS CVSS 3.1MEDIUM 6.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences