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
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. A patch is available in version 1.77.0 and later.
Technical ContextAI
Classified as CWE-22 (Path Traversal). Affects Lakefs. 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
RemediationAI
A vendor patch is available — apply it immediately. Validate and sanitize file path inputs. Use allowlists. Restrict network access to the affected service where possible.
Unauthenticated attackers can overwrite operator metadata including email and company name in lakeFS versions through 1.
lakeFS is an open-source tool that transforms object storage into a Git-like repositories. LakeFS's S3 gateway does not
Stored cross-site scripting in lakeFS Web UI allows an authenticated contributor to execute arbitrary JavaScript in any
Same weakness CWE-22 – Path Traversal
View allSame technique Path Traversal
View allVendor 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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