CVE-2026-44845 (GCVE-0-2026-44845)

Vulnerability from cvelistv5 – Published: 2026-08-17 21:03 – Updated: 2026-08-17 21:03
VLAI
Title
JumpServer: Remote Command Execution (RCE) via Jinja Template Injection in Applet Host Deployment
Summary
JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.10.17, an authenticated administrator with Applet Host management and deployment permissions can inject Jinja2 expressions into the IP/Host field or Core Service Address field, causing Ansible to evaluate ansible_host inventory data or playbook variables during Applet Host deployment and execute arbitrary commands on the JumpServer control node. This issue is fixed in version 4.10.17.
Severity
6.7 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:H
CWE
  • CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Assigner
References
Impacted products
Vendor Product Version CPE status
jumpserver jumpserver Affected: < 4.10.17
guessed Create a notification for this product.
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  "containers": {
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      "affected": [
        {
          "product": "jumpserver",
          "vendor": "jumpserver",
          "versions": [
            {
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            }
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          "value": "JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.10.17, an authenticated administrator with Applet Host management and deployment permissions can inject Jinja2 expressions into the IP/Host field or Core Service Address field, causing Ansible to evaluate ansible_host inventory data or playbook variables during Applet Host deployment and execute arbitrary commands on the JumpServer control node. This issue is fixed in version 4.10.17."
        }
      ],
      "metrics": [
        {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1336",
              "description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T21:03:08.891Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/jumpserver/jumpserver/security/advisories/GHSA-22h6-pcgh-9v7q",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/jumpserver/jumpserver/security/advisories/GHSA-22h6-pcgh-9v7q"
        },
        {
          "name": "https://github.com/jumpserver/jumpserver/pull/16749",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jumpserver/jumpserver/pull/16749"
        },
        {
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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jumpserver/jumpserver/pull/16886"
        },
        {
          "name": "https://github.com/jumpserver/jumpserver/commit/cc57ba0de5f6015746fae11cfc62402b11618e59",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jumpserver/jumpserver/commit/cc57ba0de5f6015746fae11cfc62402b11618e59"
        },
        {
          "name": "https://github.com/jumpserver/jumpserver/releases/tag/v4.10.17",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/jumpserver/jumpserver/releases/tag/v4.10.17"
        }
      ],
      "source": {
        "advisory": "GHSA-22h6-pcgh-9v7q",
        "discovery": "UNKNOWN"
      },
      "title": "JumpServer: Remote Command Execution (RCE) via Jinja Template Injection in Applet Host Deployment"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-44845",
    "datePublished": "2026-08-17T21:03:08.891Z",
    "dateReserved": "2026-05-07T21:21:48.353Z",
    "dateUpdated": "2026-08-17T21:03:08.891Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-44845\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-08-17T21:16:45.083\",\"lastModified\":\"2026-08-17T21:16:45.083\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.10.17, an authenticated administrator with Applet Host management and deployment permissions can inject Jinja2 expressions into the IP/Host field or Core Service Address field, causing Ansible to evaluate ansible_host inventory data or playbook variables during Applet Host deployment and execute arbitrary commands on the JumpServer control node. This issue is fixed in version 4.10.17.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"jumpserver\",\"product\":\"jumpserver\",\"versions\":[{\"version\":\"\u003c 4.10.17\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:H\",\"baseScore\":6.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.2,\"impactScore\":5.5}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-1336\"}]}],\"references\":[{\"url\":\"https://github.com/jumpserver/jumpserver/commit/cc57ba0de5f6015746fae11cfc62402b11618e59\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/jumpserver/jumpserver/pull/16749\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/jumpserver/jumpserver/pull/16886\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/jumpserver/jumpserver/releases/tag/v4.10.17\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/jumpserver/jumpserver/security/advisories/GHSA-22h6-pcgh-9v7q\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.