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TI-2026-35469 Aliases CVE-2026-48026

lakeFS vulnerable to stored XSS in rendered markdown previews via raw HTML

Priority MEDIUM 40CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00367 30th percentileScored 2026-11-07
Fix Fixed lakeFS (treeverse): 1.81.1lakeFS-enterprise (treeverse): 1.84.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
treeverselakeFSbefore 1.81.11.81.1Patch availableCNA
treeverselakeFS-enterprisebefore 1.84.01.84.0Patch availableCNA
  • lakeFS Vendortreeverse Affected before 1.81.1 Fixed in 1.81.1 Patch available CNA
  • lakeFS-enterprise Vendortreeverse Affected before 1.84.0 Fixed in 1.84.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:lakefs:lakefs:*:*:*:*:*:*:*:*——treeverse
  • cpe:2.3:a:lakefs:lakefs:*:*:*:*:*:*:*:* Versions — — ·treeverse

Remediation

  • Fix · CNA lakeFS (treeverse) Fixed in 1.81.1
  • Fix · CNA lakeFS-enterprise (treeverse) Fixed in 1.84.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-48026

References

Other 2

  • TI-2026-47004 lakeFS Unauthenticated Operator Metadata Overwrite via setup_comm_prefs CVSS 4.0MEDIUM 6.9
  • TI-2026-21178 lakeFS vulnerable to path traversal in local block adapter allow cross-namespace and sibling directory access CVSS 3.1HIGH 8.1
  • TI-2025-42164 lakeFS is Missing Timestamp Validation in S3 Gateway Authentication CVSS 3.1MEDIUM 6.5
  • TI-2025-39622 lakeFS: Unauthenticated access to API usage metrics CVSS 3.1MEDIUM 5.3
  • TI-2025-19970 An authenticated user can crash lakeFS by exhausting server memory CVSS 3.1MEDIUM 6.5
  • TI-2024-29379 Re-creating a deleted user in lakeFS will re-enable previous user credentials that existed prior to it's deletion CVSS 3.1MEDIUM 5.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences