Vulnerability-Lookup

UBUNTU-CVE-2026-62866 (CVE-2026-62866)

Vulnerability from osv_ubuntu – Published: 2026-09-21 17:17 – Updated: 2026-09-21 17:17 – Source website

Details

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.

Severity

6.2 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-62866	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-62866	REPORT
	https://github.com/TomWright/dasel/commit/eee03ae…	REPORT
	https://github.com/TomWright/dasel/releases/tag/v3.11.2	REPORT
	https://github.com/TomWright/dasel/security/advis…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "dasel",
            "binary_version": "2.6.0-1ubuntu0.3+esm2"
          },
          {
            "binary_name": "golang-github-tomwright-dasel-dev",
            "binary_version": "2.6.0-1ubuntu0.3+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "dasel",
        "purl": "pkg:deb/ubuntu/dasel@2.6.0-1ubuntu0.3+esm2?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.6.0-1",
        "2.6.0-1build1",
        "2.6.0-1ubuntu0.1",
        "2.6.0-1ubuntu0.2",
        "2.6.0-1ubuntu0.2+esm1",
        "2.6.0-1ubuntu0.3",
        "2.6.0-1ubuntu0.3+esm1",
        "2.6.0-1ubuntu0.3+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "dasel",
            "binary_version": "2.8.1-1build1"
          },
          {
            "binary_name": "golang-github-tomwright-dasel-dev",
            "binary_version": "2.8.1-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "dasel",
        "purl": "pkg:deb/ubuntu/dasel@2.8.1-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.8.1-1",
        "2.8.1-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-62866",
  "modified": "2026-09-21T17:17:00Z",
  "published": "2026-09-21T17:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-62866"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-62866"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/TomWright/dasel/commit/eee03aec28d4a33d6138098d065b7b37b85e3c55"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/TomWright/dasel/releases/tag/v3.11.2"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/TomWright/dasel/security/advisories/GHSA-65gg-g7rw-6cpc"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-62866"
  ]
}

CVE-2026-62866 (GCVE-0-2026-62866)

Vulnerability from cvelistv5 – Published: 2026-09-21 16:51 – Updated: 2026-09-21 18:00

Title

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

Summary

Severity

6.2 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-21 17:59 UTC

CWE

CWE-129 - Improper Validation of Array Index

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/TomWright/dasel/security/advis…	x_refsource_CONFIRM
https://github.com/TomWright/dasel/commit/eee03ae…	x_refsource_MISC
https://github.com/TomWright/dasel/releases/tag/v3.11.2	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
TomWright	dasel	Affected: >= 3.0.0, < 3.11.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-62866",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-21T17:59:52.863215Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-21T18:00:18.178Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/TomWright/dasel/security/advisories/GHSA-65gg-g7rw-6cpc"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "dasel",
          "vendor": "TomWright",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c 3.11.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.2,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-129",
              "description": "CWE-129: Improper Validation of Array Index",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-21T16:55:00.169Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/TomWright/dasel/security/advisories/GHSA-65gg-g7rw-6cpc",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/TomWright/dasel/security/advisories/GHSA-65gg-g7rw-6cpc"
        },
        {
          "name": "https://github.com/TomWright/dasel/commit/eee03aec28d4a33d6138098d065b7b37b85e3c55",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/TomWright/dasel/commit/eee03aec28d4a33d6138098d065b7b37b85e3c55"
        },
        {
          "name": "https://github.com/TomWright/dasel/releases/tag/v3.11.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/TomWright/dasel/releases/tag/v3.11.2"
        }
      ],
      "source": {
        "advisory": "GHSA-65gg-g7rw-6cpc",
        "discovery": "UNKNOWN"
      },
      "title": "Dasel: Selector lexer panics on trailing whitespace in `parseCurRune`"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-62866",
    "datePublished": "2026-09-21T16:51:18.520Z",
    "dateReserved": "2026-07-14T21:10:50.032Z",
    "dateUpdated": "2026-09-21T18:00:18.178Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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UBUNTU-CVE-2026-62866 (CVE-2026-62866)

CVE-2026-62866 (GCVE-0-2026-62866)

Tags

Sightings

Nomenclature

Related by attack behaviour