CVE-2026-66006: lakefs Missing Auth — Exploit & Fix

Description

lakeFS through 1.83.0, fixed in commit 71a45ee, contains an authentication bypass vulnerability in the /setup_comm_prefs endpoint that allows unauthenticated attackers to overwrite operator metadata including email, name, and company after setup completion. Attackers can POST to this endpoint to modify security update preferences, disable security communications, and trigger falsified telemetry events using the legitimate installation ID.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS — Exploit Prediction

0.0032

Probability of exploitation

0.24%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-306 Missing Authentication

Affected Products

Vendor	Product	Versions
lakefs	lakefs	< 1.83.0

References

Advisories & Patches

https://github.com/treeverse/lakeFS/commit/71a45eeb1639d146d34b8effd7e86d077160ed7c https://github.com/treeverse/lakeFS/pull/10499 https://www.vulncheck.com/advisories/lakefs-unauthenticated-operator-metadata-overwrite-via-setup-comm-prefs

Exploits

https://github.com/treeverse/lakeFS/issues/10465

Frequently Asked Questions

What is CVE-2026-66006? +

lakeFS through 1.83.0, fixed in commit 71a45ee, contains an authentication bypass vulnerability in the /setup_comm_prefs endpoint that allows unauthenticated attackers to overwrite operator metadata including email, name, and company after setup completion. Attackers can POST to this endpoint to modify security update preferences, disable security communications, and trigger falsified telemetry events using the legitimate installation ID. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-66006? +

CVE-2026-66006 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0032, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-66006? +

CVE-2026-66006 affects products from lakefs, specifically: lakefs. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-66006? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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