CVE-2026-66006: lakeFS through 1.83.0, fixed in commit 71a45ee, contains an authentication bypass vulnerability in the /setup_

Q: How do I fix CVE-2026-66006?

lakefs: upgrade to newer than 1.83.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-66006 being exploited?

CVE-2026-66006 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-66006 affect?

CVE-2026-66006 affects lakefs. Severity is medium (CVSS 5.3). 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

Q: How urgent is CVE-2026-66006?

Priority 40/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-66006 is a medium-severity flaw (CVSS 5.3) affecting lakefs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-07-24
Last modified	2026-10-24

Publisher (CNA): VulnCheck · Vendor: lakefs

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-24 15:19 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

lakefs lakefs UPGRADE

Affected: <= 1.83.0

Fixed in: newer than 1.83.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy lakefs || rpm -q lakefs || lakefs --version

2. UPGRADE to newer than 1.83.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade lakefs

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lakefs

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Fedora 46 · moby-engine · FIXED · 29.9.2-2.fc46 · FEDORA-2026-4856be87b3 · source

sudo dnf upgrade --advisory=FEDORA-2026-4856be87b3

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/treeverse/lakeFS/issues/10465
Write-up: github.com/treeverse/lakeFS/pull/10499

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-66006?

lakefs: upgrade to newer than 1.83.0. Exact commands for each OS are on this page.

Is CVE-2026-66006 being exploited?

CVE-2026-66006 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-66006 affect?

CVE-2026-66006 affects lakefs. Severity is medium (CVSS 5.3). 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

How urgent is CVE-2026-66006?

Priority 40/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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