{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-82958", "assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c", "state": "PUBLISHED", "assignerShortName": "eclipse", "dateReserved": "2026-08-31T12:47:29.479Z", "datePublished": "2026-09-02T10:12:49.085Z", "dateUpdated": "2026-09-02T12:53:05.342Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c", "shortName": "eclipse", "dateUpdated": "2026-09-02T10:12:49.085Z"}, "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-1336", "description": "CWE-1336 Improper neutralization of special elements used in a template engine", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-116", "description": "CWE-116 Improper Encoding or Escaping of Output", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-74", "description": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-137", "descriptions": [{"lang": "en", "value": "CAPEC-137 Parameter Injection"}]}, {"capecId": "CAPEC-1", "descriptions": [{"lang": "en", "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"}]}], "affected": [{"vendor": "Eclipse Foundation", "product": "Eclipse Ditto", "versions": [{"status": "affected", "version": "1.3.0", "lessThanOrEqual": "3.9.6", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "In Eclipse Ditto versions [1.3.0, 3.9.6], the ImplicitThingCreationMessageMapper of the connectivity service builds a CreateThing command by substituting placeholder values (e.g. {{ header:device_id }}) resolved from inbound message headers into a pre-configured JSON \"thing\" template as raw, un-escaped strings, and then parses the resulting string as JSON. Because the placeholder engine performs no JSON escaping and is unaware of the surrounding JSON string context, a resolved value containing a double-quote character can break out of its string and inject additional JSON structure.\n\n\n\n\nWhen a connection is configured to use this mapper with a template that reflects a header whose value a publishing device can control (for example an MQTT 5 user property, an AMQP 1.0 application property, or a Kafka record header), an attacker able to publish on that connection can inject an inline _policy object. The inline policy overrides the administrator-configured policyId, letting the attacker assign an arbitrary access-control policy to the newly created digital twin \u2014 gaining full read/write access to it and potentially revoking the legitimate owner's access, with no administrator interaction.\n\n\n\n\nExploitation requires all of the following: the connection uses the (non-default) ImplicitThingCreation mapper; its template reflects an attacker-controllable header; and, for the policy-override impact, the connection's authorization subjects are permitted to create policies (the default). Deployments that restrict the connection's subjects to thing creation only via the entity-creation configuration are not affected by the policy-override impact.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>In Eclipse Ditto versions [1.3.0, 3.9.6], the <code>ImplicitThingCreationMessageMapper</code> of the connectivity service builds a <code>CreateThing</code> command by substituting placeholder values (e.g. <code>{{ header:device_id }}</code>) resolved from inbound message headers into a pre-configured JSON \"thing\" template as raw, un-escaped strings, and then parses the resulting string as JSON. 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Deployments that restrict the connection's subjects to thing creation only via the <code>entity-creation</code> configuration are not affected by the policy-override impact.</p>"}]}], "references": [{"url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/764"}, {"url": "https://github.com/eclipse-ditto/ditto/security/advisories/GHSA-cgfq-3fv9-5c44"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.6, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}}], "credits": [{"lang": "en", "value": "Mohamed Lemine Ahmed Jidou", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}, "adp": [{"references": [{"url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/764", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-02T12:52:37.950498Z", "id": "CVE-2026-82958", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T12:53:05.342Z"}}]}}

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Because the placeholder engine performs no JSON escaping and is unaware of the surrounding JSON string context, a resolved value containing a double-quote character can break out of its string and inject additional JSON structure.\n\n\n\n\nWhen a connection is configured to use this mapper with a template that reflects a header whose value a publishing device can control (for example an MQTT 5 user property, an AMQP 1.0 application property, or a Kafka record header), an attacker able to publish on that connection can inject an inline _policy object. The inline policy overrides the administrator-configured policyId, letting the attacker assign an arbitrary access-control policy to the newly created digital twin \u2014 gaining full read/write access to it and potentially revoking the legitimate owner's access, with no administrator interaction.\n\n\n\n\nExploitation requires all of the following: the connection uses the (non-default) ImplicitThingCreation mapper; its template reflects an attacker-controllable header; and, for the policy-override impact, the connection's authorization subjects are permitted to create policies (the default). Deployments that restrict the connection's subjects to thing creation only via the entity-creation configuration are not affected by the policy-override impact.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>In Eclipse Ditto versions [1.3.0, 3.9.6], the <code>ImplicitThingCreationMessageMapper</code> of the connectivity service builds a <code>CreateThing</code> command by substituting placeholder values (e.g. <code>{{ header:device_id }}</code>) resolved from inbound message headers into a pre-configured JSON \"thing\" template as raw, un-escaped strings, and then parses the resulting string as JSON. Because the placeholder engine performs no JSON escaping and is unaware of the surrounding JSON string context, a resolved value containing a double-quote character can break out of its string and inject additional JSON structure.</p>\n<p>When a connection is configured to use this mapper with a template that reflects a header whose value a publishing device can control (for example an MQTT 5 user property, an AMQP 1.0 application property, or a Kafka record header), an attacker able to publish on that connection can inject an inline <code>_policy</code> object. The inline policy overrides the administrator-configured <code>policyId</code>, letting the attacker assign an arbitrary access-control policy to the newly created digital twin \u2014 gaining full read/write access to it and potentially revoking the legitimate owner's access, with no administrator interaction.</p>\n<p>Exploitation requires all of the following: the connection uses the (non-default) ImplicitThingCreation mapper; its template reflects an attacker-controllable header; and, for the policy-override impact, the connection's authorization subjects are permitted to create policies (the default). Deployments that restrict the connection's subjects to thing creation only via the <code>entity-creation</code> configuration are not affected by the policy-override impact.</p>"}]}], "references": [{"url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/764"}, {"url": "https://github.com/eclipse-ditto/ditto/security/advisories/GHSA-cgfq-3fv9-5c44"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.6, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}}], "credits": [{"lang": "en", "value": "Mohamed Lemine Ahmed Jidou", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-82958", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-02T12:52:37.950498Z"}}}], "references": [{"url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/764", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T12:52:55.487Z"}}]}}

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{}

{"created": "2026-09-02T13:00:13.173579+00:00", "title": "Policy Injection via Unescaped Header Values in Eclipse Ditto's ImplicitThingCreationMessageMapper", "updated": "2026-09-02T13:00:13.173585+00:00", "vendors": []}