CVE-2026-82427

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-82427", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-08-29T10:07:21.703Z", "datePublished": "2026-09-14T14:19:16.027Z", "dateUpdated": "2026-09-14T19:56:39.893Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-09-14T14:19:16.027Z"}, "title": "Apache Storm Nimbus: Path Traversal as the Supervisor User via Unsanitised Blobstore Map Local Name", "problemTypes": [{"descriptions": [{"description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')", "lang": "en", "cweId": "CWE-22", "type": "CWE"}]}], "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Storm Nimbus", "collectionURL": "https://repo.maven.apache.org/maven2", "packageName": "org.apache.storm:storm-server", "versions": [{"status": "affected", "version": "3.0.0", "lessThan": "3.1.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"value": "Description\n\nA topology's `topology.blobstore.map` lets the submitter choose a local name for each blob that the\nsupervisor localises. That name was used to build a path under the topology's working directory without\nnormalisation, in both `AsyncLocalizer` and `Container.createBlobstoreLinks`, and the symlink helper\nforce-deletes whatever already exists at the target before creating the link.\n\nA submitter could therefore use `../` segments to direct that delete-and-symlink operation at an arbitrary\npath, as the supervisor user, on every node the topology is scheduled onto. The consequences include\nrecursive deletion of supervisor-owned content and planting a symlink that causes a subsequent worker\nlaunch to execute attacker-chosen code as another tenant's operating-system user, which defeats the\nisolation that `supervisor.run.worker.as.user` is intended to provide.\n\nMitigation\n\nUpgrade to 3.1.0, where the resolved target must lie inside the expected root at both call sites.\n\nUsers who cannot upgrade immediately should restrict topology submission to trusted principals, and may\nreject submissions whose `topology.blobstore.map` entries contain path separators or `..` segments before\nthey reach Nimbus.\n\nCredit\n\nThe ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<b>Description</b><br><br>A topology's `topology.blobstore.map` lets the submitter choose a local name for each blob that the<br>supervisor localises. That name was used to build a path under the topology's working directory without<br>normalisation, in both `AsyncLocalizer` and `Container.createBlobstoreLinks`, and the symlink helper<br>force-deletes whatever already exists at the target before creating the link.<br><br>A submitter could therefore use `../` segments to direct that delete-and-symlink operation at an arbitrary<br>path, as the supervisor user, on every node the topology is scheduled onto. The consequences include<br>recursive deletion of supervisor-owned content and planting a symlink that causes a subsequent worker<br>launch to execute attacker-chosen code as another tenant's operating-system user, which defeats the<br>isolation that `supervisor.run.worker.as.user` is intended to provide.<br><br><b>Mitigation</b><br><br>Upgrade to 3.1.0, where the resolved target must lie inside the expected root at both call sites.<br><br>Users who cannot upgrade immediately should restrict topology submission to trusted principals, and may<br>reject submissions whose `topology.blobstore.map` entries contain path separators or `..` segments before<br>they reach Nimbus.<br><br><b>Credit</b><br><br>The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.<br>"}]}], "references": [{"url": "https://lists.apache.org/thread/o0j51w6m0qdmwypvzfnd8w97s7ysnmyj", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "credits": [{"lang": "en", "value": "The ASF using Claude Agents", "type": "finder"}], "x_generator": {"engine": "Vulnogram 1.0.3"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/09/13/7"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-09-14T15:13:37.932Z"}}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-09-14T19:56:14.837455Z", "id": "CVE-2026-82427", "options": [{"Exploitation": "none"}, {"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": "2026-09-14T19:56:39.893Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/09/13/7"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-09-14T15:13:37.932Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-82427", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-14T19:56:14.837455Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-14T19:56:34.483Z"}}], "cna": {"title": "Apache Storm Nimbus: Path Traversal as the Supervisor User via Unsanitised Blobstore Map Local Name", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "finder", "value": "The ASF using Claude Agents"}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Storm Nimbus", "versions": [{"status": "affected", "version": "3.0.0", "lessThan": "3.1.0", "versionType": "semver"}], "packageName": "org.apache.storm:storm-server", "collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected"}], "references": [{"url": "https://lists.apache.org/thread/o0j51w6m0qdmwypvzfnd8w97s7ysnmyj", "tags": ["vendor-advisory"]}], "x_generator": {"engine": "Vulnogram 1.0.3"}, "descriptions": [{"lang": "en", "value": "Description\n\nA topology's `topology.blobstore.map` lets the submitter choose a local name for each blob that the\nsupervisor localises. That name was used to build a path under the topology's working directory without\nnormalisation, in both `AsyncLocalizer` and `Container.createBlobstoreLinks`, and the symlink helper\nforce-deletes whatever already exists at the target before creating the link.\n\nA submitter could therefore use `../` segments to direct that delete-and-symlink operation at an arbitrary\npath, as the supervisor user, on every node the topology is scheduled onto. The consequences include\nrecursive deletion of supervisor-owned content and planting a symlink that causes a subsequent worker\nlaunch to execute attacker-chosen code as another tenant's operating-system user, which defeats the\nisolation that `supervisor.run.worker.as.user` is intended to provide.\n\nMitigation\n\nUpgrade to 3.1.0, where the resolved target must lie inside the expected root at both call sites.\n\nUsers who cannot upgrade immediately should restrict topology submission to trusted principals, and may\nreject submissions whose `topology.blobstore.map` entries contain path separators or `..` segments before\nthey reach Nimbus.\n\nCredit\n\nThe ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.", "supportingMedia": [{"type": "text/html", "value": "<b>Description</b><br><br>A topology's `topology.blobstore.map` lets the submitter choose a local name for each blob that the<br>supervisor localises. That name was used to build a path under the topology's working directory without<br>normalisation, in both `AsyncLocalizer` and `Container.createBlobstoreLinks`, and the symlink helper<br>force-deletes whatever already exists at the target before creating the link.<br><br>A submitter could therefore use `../` segments to direct that delete-and-symlink operation at an arbitrary<br>path, as the supervisor user, on every node the topology is scheduled onto. The consequences include<br>recursive deletion of supervisor-owned content and planting a symlink that causes a subsequent worker<br>launch to execute attacker-chosen code as another tenant's operating-system user, which defeats the<br>isolation that `supervisor.run.worker.as.user` is intended to provide.<br><br><b>Mitigation</b><br><br>Upgrade to 3.1.0, where the resolved target must lie inside the expected root at both call sites.<br><br>Users who cannot upgrade immediately should restrict topology submission to trusted principals, and may<br>reject submissions whose `topology.blobstore.map` entries contain path separators or `..` segments before<br>they reach Nimbus.<br><br><b>Credit</b><br><br>The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.<br>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-22", "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-09-14T14:19:16.027Z"}}}, "cveMetadata": {"cveId": "CVE-2026-82427", "state": "PUBLISHED", "dateUpdated": "2026-09-14T19:56:39.893Z", "dateReserved": "2026-08-29T10:07:21.703Z", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "datePublished": "2026-09-14T14:19:16.027Z", "assignerShortName": "apache"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected", "packageName": "org.apache.storm:storm-server", "product": "Apache Storm Nimbus", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "3.1.0", "status": "affected", "version": "3.0.0", "versionType": "semver"}]}], "source": "security@apache.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Description\n\nA topology's `topology.blobstore.map` lets the submitter choose a local name for each blob that the\nsupervisor localises. That name was used to build a path under the topology's working directory without\nnormalisation, in both `AsyncLocalizer` and `Container.createBlobstoreLinks`, and the symlink helper\nforce-deletes whatever already exists at the target before creating the link.\n\nA submitter could therefore use `../` segments to direct that delete-and-symlink operation at an arbitrary\npath, as the supervisor user, on every node the topology is scheduled onto. The consequences include\nrecursive deletion of supervisor-owned content and planting a symlink that causes a subsequent worker\nlaunch to execute attacker-chosen code as another tenant's operating-system user, which defeats the\nisolation that `supervisor.run.worker.as.user` is intended to provide.\n\nMitigation\n\nUpgrade to 3.1.0, where the resolved target must lie inside the expected root at both call sites.\n\nUsers who cannot upgrade immediately should restrict topology submission to trusted principals, and may\nreject submissions whose `topology.blobstore.map` entries contain path separators or `..` segments before\nthey reach Nimbus.\n\nCredit\n\nThe ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm."}], "id": "CVE-2026-82427", "lastModified": "2026-09-14T20:58:48.430", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-82427", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-14T19:56:14.837455Z", "version": "2.0.3"}}]}, "published": "2026-09-14T15:17:09.553", "references": [{"source": "security@apache.org", "url": "https://lists.apache.org/thread/o0j51w6m0qdmwypvzfnd8w97s7ysnmyj"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/09/13/7"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "security@apache.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.0,3.1.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Apache Storm Nimbus", "source": "cna", "vendor": "Apache Software Foundation"}, "product": "storm_nimbus", "vendor": "apache"}], "created": "2026-09-15T13:45:07.848251+00:00", "updated": "2026-11-10T23:00:06.265494+00:00", "vendors": ["apache", "apache$PRODUCT$storm_nimbus"]}