Vulnerability-Lookup

CVE-2026-40050 (GCVE-0-2026-40050)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:48 – Updated: 2026-04-21 17:25

Title

CrowdStrike LogScale Unauthenticated Path Traversal

Summary

CrowdStrike has released security updates to address a critical unauthenticated path traversal vulnerability (CVE-2026-40050) in LogScale. This vulnerability only requires mitigation by customers that host specific versions of LogScale and does not affect Next-Gen SIEM customers. The vulnerability exists in a specific cluster API endpoint that, if exposed, allows a remote attacker to read arbitrary files from the server filesystem without authentication. Next-Gen SIEM customers are not affected and do not need to take any action. CrowdStrike mitigated the vulnerability for LogScale SaaS customers by deploying network-layer blocks to all clusters on April 7, 2026. We have proactively reviewed all log data and there is no evidence of exploitation. LogScale Self-hosted customers should upgrade to a patched version immediately to remediate the vulnerability. CrowdStrike identified this vulnerability during continuous and ongoing product testing.

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-21 17:24 UTC

CWE

CWE-306 - Missing authentication for critical function
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

CrowdStrike mitre root

References

1 reference

URL	Tags
https://www.crowdstrike.com/en-us/security-adviso…

Impacted products

1 product

Vendor	Product	Version	CPE status
CrowdStrike	LogScale Self-Hosted	Affected: 1.224.0 , ≤ 1.235.0 (semver)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40050",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-21T17:24:56.089262Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-21T17:25:29.299Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "LogScale Self-Hosted",
          "vendor": "CrowdStrike",
          "versions": [
            {
              "changes": [
                {
                  "at": "1.233.1, 1.234.1, 1.235.1, 1.228.2",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "1.235.0",
              "status": "affected",
              "version": "1.224.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "CrowdStrike has released security updates to address a critical unauthenticated path traversal vulnerability (CVE-2026-40050) in LogScale. This vulnerability only requires mitigation by customers that host specific versions of LogScale and does not affect Next-Gen SIEM customers. The vulnerability exists in a specific cluster API endpoint that, if exposed, allows a remote attacker to read arbitrary files from the server filesystem without authentication.\u003cbr\u003e\u003cbr\u003eNext-Gen SIEM customers are not affected and do not need to take any action. CrowdStrike mitigated the vulnerability for LogScale SaaS customers by deploying network-layer blocks to all clusters on April 7, 2026. We have proactively reviewed all log data and there is no evidence of exploitation.\u003cbr\u003e\u003cbr\u003eLogScale Self-hosted customers should upgrade to a patched version immediately to remediate the vulnerability.\u003cbr\u003e\u003cbr\u003eCrowdStrike identified this vulnerability during continuous and ongoing product testing.\u003cbr\u003e"
            }
          ],
          "value": "CrowdStrike has released security updates to address a critical unauthenticated path traversal vulnerability (CVE-2026-40050) in LogScale. This vulnerability only requires mitigation by customers that host specific versions of LogScale and does not affect Next-Gen SIEM customers. The vulnerability exists in a specific cluster API endpoint that, if exposed, allows a remote attacker to read arbitrary files from the server filesystem without authentication.\n\nNext-Gen SIEM customers are not affected and do not need to take any action. CrowdStrike mitigated the vulnerability for LogScale SaaS customers by deploying network-layer blocks to all clusters on April 7, 2026. We have proactively reviewed all log data and there is no evidence of exploitation.\n\nLogScale Self-hosted customers should upgrade to a patched version immediately to remediate the vulnerability.\n\nCrowdStrike identified this vulnerability during continuous and ongoing product testing."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306 Missing authentication for critical function",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-22",
              "description": "Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-21T16:52:13.235Z",
        "orgId": "13ddcd98-6f4a-40a8-8e24-29ca0aee4661",
        "shortName": "CrowdStrike"
      },
      "references": [
        {
          "url": "https://www.crowdstrike.com/en-us/security-advisories/cve-2026-40050/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "CrowdStrike LogScale Unauthenticated Path Traversal",
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "13ddcd98-6f4a-40a8-8e24-29ca0aee4661",
    "assignerShortName": "CrowdStrike",
    "cveId": "CVE-2026-40050",
    "datePublished": "2026-04-21T16:48:24.722Z",
    "dateReserved": "2026-04-08T18:55:21.490Z",
    "dateUpdated": "2026-04-21T17:25:29.299Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-40050",
      "date": "2026-09-17",
      "epss": "0.00597",
      "percentile": "0.47006"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-40050\",\"sourceIdentifier\":\"13ddcd98-6f4a-40a8-8e24-29ca0aee4661\",\"published\":\"2026-04-21T17:16:53.610\",\"lastModified\":\"2026-06-17T10:44:40.210\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"CrowdStrike has released security updates to address a critical unauthenticated path traversal vulnerability (CVE-2026-40050) in LogScale. This vulnerability only requires mitigation by customers that host specific versions of LogScale and does not affect Next-Gen SIEM customers. The vulnerability exists in a specific cluster API endpoint that, if exposed, allows a remote attacker to read arbitrary files from the server filesystem without authentication.\\n\\nNext-Gen SIEM customers are not affected and do not need to take any action. CrowdStrike mitigated the vulnerability for LogScale SaaS customers by deploying network-layer blocks to all clusters on April 7, 2026. We have proactively reviewed all log data and there is no evidence of exploitation.\\n\\nLogScale Self-hosted customers should upgrade to a patched version immediately to remediate the vulnerability.\\n\\nCrowdStrike identified this vulnerability during continuous and ongoing product testing.\"}],\"affected\":[{\"source\":\"13ddcd98-6f4a-40a8-8e24-29ca0aee4661\",\"affectedData\":[{\"vendor\":\"CrowdStrike\",\"product\":\"LogScale Self-Hosted\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"1.224.0\",\"lessThanOrEqual\":\"1.235.0\",\"versionType\":\"semver\",\"status\":\"affected\",\"changes\":[{\"at\":\"1.233.1, 1.234.1, 1.235.1, 1.228.2\",\"status\":\"unaffected\"}]}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"13ddcd98-6f4a-40a8-8e24-29ca0aee4661\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-04-21T17:24:56.089262Z\",\"id\":\"CVE-2026-40050\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"13ddcd98-6f4a-40a8-8e24-29ca0aee4661\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-22\"},{\"lang\":\"en\",\"value\":\"CWE-306\"}]}],\"references\":[{\"url\":\"https://www.crowdstrike.com/en-us/security-advisories/cve-2026-40050/\",\"source\":\"13ddcd98-6f4a-40a8-8e24-29ca0aee4661\"}]}}",
    "redhat_vex": {
      "current_release_date": "2026-06-05T19:14:02+00:00",
      "cve": "CVE-2026-40050",
      "id": "CVE-2026-40050",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "CrowdStrike LogScale Unauthenticated Path Traversal",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40050.json",
      "version": "3"
    }
  }
}

FKIE_CVE-2026-40050

Vulnerability from fkie_nvd - Published: 2026-04-21 17:16 - Updated: 2026-06-17 10:44

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	13ddcd98-6f4a-40a8-8e24-29ca0aee4661	https://www.crowdstrike.com/en-us/security-advisories/cve-2026-40050/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "LogScale Self-Hosted",
          "vendor": "CrowdStrike",
          "versions": [
            {
              "changes": [
                {
                  "at": "1.233.1, 1.234.1, 1.235.1, 1.228.2",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "1.235.0",
              "status": "affected",
              "version": "1.224.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "13ddcd98-6f4a-40a8-8e24-29ca0aee4661"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "CrowdStrike has released security updates to address a critical unauthenticated path traversal vulnerability (CVE-2026-40050) in LogScale. This vulnerability only requires mitigation by customers that host specific versions of LogScale and does not affect Next-Gen SIEM customers. The vulnerability exists in a specific cluster API endpoint that, if exposed, allows a remote attacker to read arbitrary files from the server filesystem without authentication.\n\nNext-Gen SIEM customers are not affected and do not need to take any action. CrowdStrike mitigated the vulnerability for LogScale SaaS customers by deploying network-layer blocks to all clusters on April 7, 2026. We have proactively reviewed all log data and there is no evidence of exploitation.\n\nLogScale Self-hosted customers should upgrade to a patched version immediately to remediate the vulnerability.\n\nCrowdStrike identified this vulnerability during continuous and ongoing product testing."
    }
  ],
  "id": "CVE-2026-40050",
  "lastModified": "2026-06-17T10:44:40.210",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "13ddcd98-6f4a-40a8-8e24-29ca0aee4661",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-40050",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-21T17:24:56.089262Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-21T17:16:53.610",
  "references": [
    {
      "source": "13ddcd98-6f4a-40a8-8e24-29ca0aee4661",
      "url": "https://www.crowdstrike.com/en-us/security-advisories/cve-2026-40050/"
    }
  ],
  "sourceIdentifier": "13ddcd98-6f4a-40a8-8e24-29ca0aee4661",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ],
      "source": "13ddcd98-6f4a-40a8-8e24-29ca0aee4661",
      "type": "Secondary"
    }
  ]
}

GHSA-Q4QJ-HJ7M-7JGX

Vulnerability from github – Published: 2026-04-21 18:31 – Updated: 2026-04-21 18:31

Details

Next-Gen SIEM customers are not affected and do not need to take any action. CrowdStrike mitigated the vulnerability for LogScale SaaS customers by deploying network-layer blocks to all clusters on April 7, 2026. We have proactively reviewed all log data and there is no evidence of exploitation.

LogScale Self-hosted customers should upgrade to a patched version immediately to remediate the vulnerability.

CrowdStrike identified this vulnerability during continuous and ongoing product testing.

Severity

9.8 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-40050"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-21T17:16:53Z",
    "severity": "CRITICAL"
  },
  "details": "CrowdStrike has released security updates to address a critical unauthenticated path traversal vulnerability (CVE-2026-40050) in LogScale. This vulnerability only requires mitigation by customers that host specific versions of LogScale and does not affect Next-Gen SIEM customers. The vulnerability exists in a specific cluster API endpoint that, if exposed, allows a remote attacker to read arbitrary files from the server filesystem without authentication.\n\nNext-Gen SIEM customers are not affected and do not need to take any action. CrowdStrike mitigated the vulnerability for LogScale SaaS customers by deploying network-layer blocks to all clusters on April 7, 2026. We have proactively reviewed all log data and there is no evidence of exploitation.\n\nLogScale Self-hosted customers should upgrade to a patched version immediately to remediate the vulnerability.\n\nCrowdStrike identified this vulnerability during continuous and ongoing product testing.",
  "id": "GHSA-q4qj-hj7m-7jgx",
  "modified": "2026-04-21T18:31:57Z",
  "published": "2026-04-21T18:31:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40050"
    },
    {
      "type": "WEB",
      "url": "https://www.crowdstrike.com/en-us/security-advisories/cve-2026-40050"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

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

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-40050 (GCVE-0-2026-40050)

FKIE_CVE-2026-40050

GHSA-Q4QJ-HJ7M-7JGX

Tags

Sightings

Nomenclature

Related by attack behaviour