Is there a public exploit for CVE-2026-55098?

No public exploit for CVE-2026-55098 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-55098?

CVE-2026-55098 scores CVSS 6.5 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.32%.

What does CVE-2026-55098 affect?

CVE-2026-55098 affects Basekick-Labs Arc.

6.5 Medium

Arc is an open, SQL-native time-series database for telemetry.

CVE-2026-55098

Arc is an open, SQL-native time-series database for telemetry. Prior to the repository-verified 26.06.2 repair, the remediation of CVE-2026-47735 leaves a cross-database authorization bypass through DuckDB table-valued I/O functions. In internal/database/sandbox.go, alloweddirectories uses cfg.LocalStorageRoot, configured by storage.localpath, while enableexternalaccess=false blocks access outside that entire multi-tenant root. GetStoragePath in internal/storage/util.go stores all databases beneath it. In internal/api/query.go, extractTableReferences skips names followed by an opening parenthesis and checkQueryPermissions allows queries with no extracted table references, including tokens with permissions: []. The userSQLReadParquetPattern denylist catches literal readparquet( and the earlier protection also blocks arcpartitionagg(, but misses the parquetscan alias and glob, parquetmetadata, parquetschema, readblob, readcsvauto, readjson and readtext. A request to POST /api/v1/query using these unblocked functions passes ValidateSQLRequest and convertSQLToStoragePaths without tenant authorization, allowing reads and enumeration of other databases' time-series data, schema and…

Assessment

CVSS: 6.5 (v3.1)
Severity: Medium
EPSS: 0.32% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 October 2026
Last updated: 2 November 2026
Affected: Basekick-Labs · Arc
Assigner: GitHub_M

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

At the source

EUVD (ENISA)

References

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