CVE-2026-82437Medium· 4.3▾ SunlitDescription 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 au…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 23.7 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
— → 4.3
none → medium
0.3%
0.3% → 0.3%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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