CVE-2026-48105: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Basekick-Labs arc
CVE-2026-48105 is a path traversal vulnerability in Basekick-Labs arc, an open SQL-native time-series database. Prior to version 26.06.1, the Arc Enterprise Raft FSM component accepts attacker-controlled file paths in manifest-registration proposals without proper validation. This allows paths with parent directory traversal sequences and other unauthorized formats. The vulnerability is fixed in version 26.06.1. Workarounds include restricting cluster network access, auditing manifest paths, or disabling cluster mode until patched.
AI Analysis
Technical Summary
Arc Enterprise's Raft FSM (internal/cluster/raft/fsm.go:applyRegisterFile) accepts file paths from manifest-registration proposals without validating them against the configured storage backend. The only check is that the path is non-empty, with no rejection of parent-traversal sequences ('..'), no allowlist of legitimate path prefixes, no scheme restrictions, and no length bounds. This improper limitation of pathname to a restricted directory (CWE-22) can lead to unauthorized file access or manipulation. The issue is resolved in version 26.06.1. Since arc is a cloud service, the vendor manages remediation server-side.
Potential Impact
An attacker with at least low privileges in the cluster can submit manifest-registration proposals containing crafted file paths to access or manipulate files outside the intended storage backend directory. This can lead to high-impact consequences such as unauthorized data access or integrity violations within the cluster environment. The vulnerability has a CVSS 4.0 score of 8.3 (high severity), indicating significant risk if exploited.
Mitigation Recommendations
A patch is available in version 26.06.1 that fixes the path validation issue. Since arc is a cloud-hosted service, the vendor manages remediation server-side. Until the fix is applied, it is recommended to restrict cluster network access to trusted peers using strict firewall rules, audit cluster manifests for unexpected or suspicious paths that do not match the configured storage backend root, and consider disabling cluster mode to prevent exploitation.
CVE-2026-48105: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Basekick-Labs arc
Description
CVE-2026-48105 is a path traversal vulnerability in Basekick-Labs arc, an open SQL-native time-series database. Prior to version 26.06.1, the Arc Enterprise Raft FSM component accepts attacker-controlled file paths in manifest-registration proposals without proper validation. This allows paths with parent directory traversal sequences and other unauthorized formats. The vulnerability is fixed in version 26.06.1. Workarounds include restricting cluster network access, auditing manifest paths, or disabling cluster mode until patched.
CVSS v4.0
Score 8.3high
Affected software
pkg:github/basekick-labs/arcRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Arc Enterprise's Raft FSM (internal/cluster/raft/fsm.go:applyRegisterFile) accepts file paths from manifest-registration proposals without validating them against the configured storage backend. The only check is that the path is non-empty, with no rejection of parent-traversal sequences ('..'), no allowlist of legitimate path prefixes, no scheme restrictions, and no length bounds. This improper limitation of pathname to a restricted directory (CWE-22) can lead to unauthorized file access or manipulation. The issue is resolved in version 26.06.1. Since arc is a cloud service, the vendor manages remediation server-side.
Potential Impact
An attacker with at least low privileges in the cluster can submit manifest-registration proposals containing crafted file paths to access or manipulate files outside the intended storage backend directory. This can lead to high-impact consequences such as unauthorized data access or integrity violations within the cluster environment. The vulnerability has a CVSS 4.0 score of 8.3 (high severity), indicating significant risk if exploited.
Mitigation Recommendations
A patch is available in version 26.06.1 that fixes the path validation issue. Since arc is a cloud-hosted service, the vendor manages remediation server-side. Until the fix is applied, it is recommended to restrict cluster network access to trusted peers using strict firewall rules, audit cluster manifests for unexpected or suspicious paths that do not match the configured storage backend root, and consider disabling cluster mode to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-20T18:40:45.836Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
Threat ID: 6a88d6dfacd9273b49d6b7b0
Added to database: 08/21/2026, 22:53:19 UTC
Last enriched: 08/21/2026, 23:07:23 UTC
Last updated: 08/22/2026, 02:50:59 UTC
Views: 7
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