Lakefs
CVE-2026-26187
HIGH
GHSA-699m-4v95-rmpm
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
3DescriptionGitHub Advisory
lakeFS is an open-source tool that transforms object storage into a Git-like repositories. Prior to 1.77.0, the local block adapter (pkg/block/local/adapter.go) allows authenticated users to read and write files outside their designated storage boundaries. The verifyRelPath function used strings.HasPrefix() to verify that requested paths fall within the configured storage directory. This check was insufficient because it validated only the path prefix without requiring a path separator, allowing access to sibling directories with similar names. Also, the adapter verified that resolved paths stayed within the adapter's base path, but did not verify that object identifiers stayed within their designated storage namespace. This allowed attackers to use path traversal sequences in the object identifier to access files in other namespaces. Fixed in version v1.77.0.
AnalysisAI
Authenticated users in lakeFS prior to version 1.77.0 can exploit path traversal vulnerabilities in the local block adapter to read and write files outside their intended storage boundaries by bypassing insufficient prefix validation checks. An attacker with valid credentials can manipulate object identifiers and path sequences to access sibling directories and storage namespaces they should not have access to. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Authenticated user account on lakeFS instance prior to version 1.77.0 with local block adapter enabled; access to path manipulation endpoints that use the vulnerable verifyRelPath function in pkg/block/local/adapter.go Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.1 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker (requires authentication) could exploit this vulnerability to read and write files outside their designated storage boundaries. |
| Remediation | A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all lakeFS deployments and confirm versions; assess if systems are internet-facing or accessible to untrusted users. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Vendor StatusVendor
SUSE
Severity: High| Product | Status |
|---|---|
| openSUSE Leap 15.6 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Fixed |
| openSUSE Leap 15.5 | Fixed |
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External POC / Exploit Code
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