CVE-2026-39419: MaxKB is an open-source AI assistant for enterprise

Q: How do I fix CVE-2026-39419?

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

Q: Is CVE-2026-39419 being exploited?

CVE-2026-39419 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-2026-39419 affect?

CVE-2026-39419 affects maxkb. Severity is low (CVSS 3.1). MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, an authenticated user can bypass sandbox result validation and spoof tool execution results by exploiting Python frame introspection to read the wrapper's UUI

Q: How urgent is CVE-2026-39419?

Priority 14/100. No elevated risk signals yet.

Routine

LOW 3.1UPGRADE

CVE-2026-39419 is a low-severity flaw (CVSS 3.1) 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. In versions 2.7.1 and below, an authenticated user can bypass sandbox result validation and spoof tool execution results by exploiting Python frame introspection to read the wrapper's UUID from its bytecode constants, then writing a forged result directly to file descriptor 1 (bypassing stdout redirection). By calling sys.exit(0), the attacker terminates the wrapper before it prints the legitim

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.1 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-74, CWE-290, CWE-693
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 02:16 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-2026-39419?

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

Is CVE-2026-39419 being exploited?

CVE-2026-39419 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-2026-39419 affect?

CVE-2026-39419 affects maxkb. Severity is low (CVSS 3.1). MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, an authenticated user can bypass sandbox result validation and spoof tool execution results by exploiting Python frame introspection to read the wrapper's UUI

How urgent is CVE-2026-39419?

Priority 14/100. No elevated risk signals yet.

Software pages

Python vulnerabilities

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-2026-39417 MEDIUM 4.6 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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