CVE-2026-26187Network attack vector

Authenticated file access via local-adapter path traversal

Published Feb 13, 2026 · Updated Feb 13, 2026

Path traversal in the local block adapter in Treeverse lakeFS before 1.77.0 allows remote authenticated users to read and write files. The verifyRelPath function accepts sibling paths that merely share the configured directory prefix, while extractParamsFromObj joins untrusted object identifiers without confining the result to their storage namespace. Only deployments using the local block adapter are exposed; access to one namespace enables cross-namespace and adjacent-directory reads and writes.

CVSS severity8.1
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in the local block adapter in Treeverse lakeFS before 1.77.0 allows remote authenticated users to read and write files. The verifyRelPath function accepts sibling paths that merely share the configured directory prefix, while extractParamsFromObj joins untrusted object identifiers without confining the result to their storage namespace. Only deployments using the local block adapter are exposed; access to one namespace enables cross-namespace and adjacent-directory reads and writes.

The record

CVE
CVE-2026-26187
Published
Feb 13, 2026
Updated
Feb 13, 2026
Vendor
Treeverse
Product
lakeFS
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.77.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Treeverse · lakeFSversion=< 1.77.0

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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