anonhaven

CVE-2026-48026

HIGH CVSS 3.1: 8.7 EPSS 0.22%
Updated Aug 13, 2026
Treeverse
Parameter Value
CVSS 8.7 (HIGH)
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Treeverse
Public PoC No

lakeFS is an open-source tool that transforms object storage into a Git-like repositories. Prior to version 1.81.1 of the open source edition and 1.84.0 of the enterprise edition, lakeFS Web UI renders markdown files from repository objects without sanitizing the resulting HTML. A user with write access to any repository branch can commit a `.md` object containing arbitrary HTML/JavaScript.

Any other user who opens that object, or who navigates to a repository or directory containing a malicious `README.md`, executes the attacker-supplied script in their own authenticated session. lakeFS fixes the issue in v1.81.1 and lakeFS Enterprise fixes the issue in in v1.84.0. Enterprise customers using older versions can temporarily disable Markdown rendering by adding YAML to their config. No workaround exists for OSS release.

Users are advised to upgrade to the latest version for both lakeFS and lakeFS-Enterprise.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1

Weakness Type (CWE)

CWE-79 Cross-Site Scripting (XSS)

Vulnerable Products

treeverse:lakefs treeverse:lakefs-enterprise

References 2

https://github.com/treeverse/lakeFS/security/advisories/GHSA-c2r5-5j4w-2xff
https://github.com/treeverse/lakeFS/security/advisories/GHSA-c2r5-5j4w-2xff
https://github.com/treeverse/lakeFS/blob/77539527e987fb05c27e3e74c59c0a46a05c47…
https://github.com/treeverse/lakeFS/blob/77539527e987fb05c27e3e74c59c0a46a05c47a0/webui/src/pages/repositories/repository/fileRenderers/useMarkdownProcessor.tsx
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