Vulnerability-Lookup

GHSA-G26X-M427-F48F

Vulnerability from github – Published: 2026-09-22 20:34 – Updated: 2026-09-22 20:34

Summary

Hatchet: Cross-Tenant Durable Task Event Log Disclosure via Missing Authorization Check

Details

Summary

The GET /api/v1/stable/durable-tasks/{durable-task} endpoint (listDurableEventLog) is missing tenant authorization validation, allowing any authenticated user to read durable task event logs from any tenant.

Impact

This CVE requires the attacker to successfully guess the target UUID. Any authenticated Hatchet user can read durable task event logs from any other tenant, exposing: - Task display names and workflow identifiers - User messages (may contain sensitive business data) - Wait conditions and branching logic - Timing information

Severity

6.3 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/hatchet-dev/hatchet"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.91.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-63342"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-22T20:34:14Z",
    "nvd_published_at": "2026-09-21T16:17:10Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nThe `GET /api/v1/stable/durable-tasks/{durable-task}` endpoint (`listDurableEventLog`) is missing tenant authorization validation, allowing any authenticated user to read durable task event logs from any tenant.\n\n\n### Impact\nThis CVE requires the attacker to successfully guess the target UUID.\nAny authenticated Hatchet user can read durable task event logs from any other tenant, exposing:\n- Task display names and workflow identifiers\n- User messages (may contain sensitive business data)\n- Wait conditions and branching logic\n- Timing information",
  "id": "GHSA-g26x-m427-f48f",
  "modified": "2026-09-22T20:34:14Z",
  "published": "2026-09-22T20:34:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-g26x-m427-f48f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63342"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hatchet-dev/hatchet/commit/06c1fe43543e853ea98ecc2e6a575e2b8310bbeb"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/hatchet-dev/hatchet"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Hatchet: Cross-Tenant Durable Task Event Log Disclosure via Missing Authorization Check"
}

CVE-2026-63342 (GCVE-0-2026-63342)

Vulnerability from cvelistv5 – Published: 2026-09-21 15:44 – Updated: 2026-09-29 15:02

Title

Hatchet: Cross-Tenant Durable Task Event Log Disclosure via Missing Authorization Check

Summary

Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.91.1, api-contracts/openapi/paths/v1/workflow-runs/workflow_run.yaml defines the GET /api/v1/stable/durable-tasks/{durable-task} endpoint implemented by listDurableEventLog without requiring the target tenant as a parent resource, allowing an authenticated user who obtains another tenant's durable task UUID to read that task's event log. Disclosed data can include task display names, workflow identifiers, user messages, wait conditions, branching logic, and timing information. This issue is fixed in version 0.91.1.

Severity

6.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-29 15:02 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M mitre root Scorecard

References

2 references

URL	Tags
https://github.com/hatchet-dev/hatchet/security/a…	x_refsource_CONFIRM
https://github.com/hatchet-dev/hatchet/commit/06c…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
hatchet-dev	hatchet	Affected: < 0.91.1

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-63342",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-29T15:02:05.214884Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-29T15:02:14.543Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "hatchet",
          "vendor": "hatchet-dev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.91.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Hatchet is a platform for orchestrating background tasks, AI agents, and durable workflows at scale. Prior to 0.91.1, api-contracts/openapi/paths/v1/workflow-runs/workflow_run.yaml defines the GET /api/v1/stable/durable-tasks/{durable-task} endpoint implemented by listDurableEventLog without requiring the target tenant as a parent resource, allowing an authenticated user who obtains another tenant\u0027s durable task UUID to read that task\u0027s event log. Disclosed data can include task display names, workflow identifiers, user messages, wait conditions, branching logic, and timing information. This issue is fixed in version 0.91.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-21T15:44:07.494Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-g26x-m427-f48f",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/hatchet-dev/hatchet/security/advisories/GHSA-g26x-m427-f48f"
        },
        {
          "name": "https://github.com/hatchet-dev/hatchet/commit/06c1fe43543e853ea98ecc2e6a575e2b8310bbeb",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/hatchet-dev/hatchet/commit/06c1fe43543e853ea98ecc2e6a575e2b8310bbeb"
        }
      ],
      "source": {
        "advisory": "GHSA-g26x-m427-f48f",
        "discovery": "UNKNOWN"
      },
      "title": "Hatchet: Cross-Tenant Durable Task Event Log Disclosure via Missing Authorization Check"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-63342",
    "datePublished": "2026-09-21T15:44:07.494Z",
    "dateReserved": "2026-07-16T14:14:24.385Z",
    "dateUpdated": "2026-09-29T15:02:14.543Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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Action not permitted

GHSA-G26X-M427-F48F

Summary

Impact

CVE-2026-63342 (GCVE-0-2026-63342)

Tags

Sightings

Nomenclature

Related by attack behaviour