CVE-2026-39417: MaxKB is an open-source AI assistant for enterprise

Q: How do I fix CVE-2026-39417?

maxkb: upgrade to 2.8.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-39417 being exploited?

CVE-2026-39417 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-2026-39417 affect?

CVE-2026-39417 affects maxkb. Severity is medium (CVSS 4.6). MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain an incomplete fix for CVE-2025-53928, where a Remote Code Execution vulnerability still exists in the MCP node of the workflow engine. MaxKB only restrict

Q: How urgent is CVE-2026-39417?

Priority 20/100. No elevated risk signals yet.

Routine

MEDIUM 4.6UPGRADE

CVE-2026-39417 is a medium-severity flaw (CVSS 4.6) affecting maxkb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain an incomplete fix for CVE-2025-53928, where a Remote Code Execution vulnerability still exists in the MCP node of the workflow engine. MaxKB only restricts the referencing code path (loading MCP config from the database). The else branch, responsible for loading mcp_servers directly from user-supplied JSON remains completely unpatched. Since mcp_source is an opt

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.6 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-20, CWE-78
Published	2026-04-14
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: maxkb

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-14 00:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

maxkb maxkb UPGRADE

Affected: < 2.8.0

Fixed in: 2.8.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.8.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade maxkb

Note

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

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-2026-39417?

maxkb: upgrade to 2.8.0. Exact commands for each OS are on this page.

Is CVE-2026-39417 being exploited?

CVE-2026-39417 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-2026-39417 affect?

CVE-2026-39417 affects maxkb. Severity is medium (CVSS 4.6). MaxKB is an open-source AI assistant for enterprise. Versions 2.7.1 and below contain an incomplete fix for CVE-2025-53928, where a Remote Code Execution vulnerability still exists in the MCP node of the workflow engine. MaxKB only restrict

How urgent is CVE-2026-39417?

Priority 20/100. No elevated risk signals yet.

Related CVEs

CVE-2026-39421 MEDIUM 6.3 UPGRADE MaxKB is an open-source AI assistant for enterprise
CVE-2026-39424 MEDIUM 4.7 UPGRADE MaxKB is an open-source AI assistant for enterprise
CVE-2026-39425 MEDIUM 5.4 UPGRADE MaxKB is an open-source AI assistant for enterprise
CVE-2026-39419 LOW 3.1 UPGRADE MaxKB is an open-source AI assistant for enterprise
CVE-2026-39420 MEDIUM 6.3 UPGRADE MaxKB is an open-source AI assistant for enterprise

References

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