Vulnerability-Lookup

CVE-2026-82437 (GCVE-0-2026-82437)

Vulnerability from cvelistv5 – Published: 2026-09-14 14:05 – Updated: 2026-09-14 19:54

Title

Apache Storm Logviewer: Log Access Controls Not Enforced by Logviewer

Summary

Description The Logviewer offers `logs.users` and `logs.groups` so operators can control who may read log content. For daemon logs those settings were not applied: the access decision combined the "this is a daemon log" flag with the authorizer result in a way that discarded the authorizer's answer whenever the flag was set, and the daemon log page and download endpoints reached the handler without consulting an authorizer at all. Any user able to pass the configured servlet filter could therefore read `nimbus.log`, `supervisor.log` and the other daemon logs on every reachable node, which contain other tenants' topology names, owners and configuration fragments. The same advisory covers the log listing endpoints, which accepted a user argument and never applied it, so `/listLogs` and `/searchLogs` returned every tenant's topology and worker log file names regardless of the caller. That part is metadata only. There was no configuration that closed either behaviour. Mitigation Upgrade to 3.1.0, where the daemon log paths evaluate the same configured user and group lists that the worker log paths already used, and the listing endpoints filter by the requesting user. Users who cannot upgrade immediately should place the Logviewer behind a reverse proxy that restricts the daemon log endpoints, and should treat daemon log content as readable by any filter-authenticated user. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.

Severity

4.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 19:54 UTC

CWE

CWE-862 - Missing Authorization

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/hqyj3spllmbj6vg9v…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache Storm Logviewer	Affected: 3.0.0 , < 3.1.0 (semver)	guessed

Credits

The ASF using Claude Agents

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-82437

Vulnerability from fkie_nvd - Published: 2026-09-14 15:17 - Updated: 2026-09-14 20:58

Severity

4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	security@apache.org	https://lists.apache.org/thread/hqyj3spllmbj6vg9vmx29b1tjhzysdkl
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/09/13/16

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      "type": "Secondary"
    }
  ]
}

GHSA-MWQ3-C685-C87R

Vulnerability from github – Published: 2026-09-14 15:32 – Updated: 2026-09-14 21:31

Details

Description

The Logviewer offers logs.users and logs.groups so operators can control who may read log content. For daemon logs those settings were not applied: the access decision combined the "this is a daemon log" flag with the authorizer result in a way that discarded the authorizer's answer whenever the flag was set, and the daemon log page and download endpoints reached the handler without consulting an authorizer at all. Any user able to pass the configured servlet filter could therefore read nimbus.log, supervisor.log and the other daemon logs on every reachable node, which contain other tenants' topology names, owners and configuration fragments.

The same advisory covers the log listing endpoints, which accepted a user argument and never applied it, so /listLogs and /searchLogs returned every tenant's topology and worker log file names regardless of the caller. That part is metadata only.

There was no configuration that closed either behaviour.

Mitigation

Upgrade to 3.1.0, where the daemon log paths evaluate the same configured user and group lists that the worker log paths already used, and the listing endpoints filter by the requesting user.

Users who cannot upgrade immediately should place the Logviewer behind a reverse proxy that restricts the daemon log endpoints, and should treat daemon log content as readable by any filter-authenticated user.

Credit

The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.

Severity

4.3 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-82437"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-14T15:17:10Z",
    "severity": "MODERATE"
  },
  "details": "Description\n\nThe Logviewer offers `logs.users` and `logs.groups` so operators can control who may read log content. For\ndaemon logs those settings were not applied: the access decision combined the \"this is a daemon log\" flag\nwith the authorizer result in a way that discarded the authorizer\u0027s answer whenever the flag was set, and\nthe daemon log page and download endpoints reached the handler without consulting an authorizer at all. Any\nuser able to pass the configured servlet filter could therefore read `nimbus.log`, `supervisor.log` and the\nother daemon logs on every reachable node, which contain other tenants\u0027 topology names, owners and\nconfiguration fragments.\n\nThe same advisory covers the log listing endpoints, which accepted a user argument and never applied it, so\n`/listLogs` and `/searchLogs` returned every tenant\u0027s topology and worker log file names regardless of the\ncaller. That part is metadata only.\n\nThere was no configuration that closed either behaviour.\n\nMitigation\n\nUpgrade to 3.1.0, where the daemon log paths evaluate the same configured user and group lists that the\nworker log paths already used, and the listing endpoints filter by the requesting user.\n\nUsers who cannot upgrade immediately should place the Logviewer behind a reverse proxy that restricts the\ndaemon log endpoints, and should treat daemon log content as readable by any filter-authenticated user.\n\nCredit\n\nThe ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.",
  "id": "GHSA-mwq3-c685-c87r",
  "modified": "2026-09-14T21:31:41Z",
  "published": "2026-09-14T15:32:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82437"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/hqyj3spllmbj6vg9vmx29b1tjhzysdkl"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/09/13/16"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "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.

Action not permitted

CVE-2026-82437 (GCVE-0-2026-82437)

FKIE_CVE-2026-82437

GHSA-MWQ3-C685-C87R

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Sightings

Nomenclature