CVE-2026-122015: A vulnerability was found in NPC-Worldwide npcpy up to 2.1.27

Routine

MEDIUM 6.3DOWNGRADE

CVE-2026-122015 is a medium-severity flaw (CVSS 6.3) affecting npcpy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in NPC-Worldwide npcpy up to 2.1.27. This vulnerability affects the function get_mlx_response of the file npcpy/gen/response.py of the component MLX Provider. The manipulation of the argument model results in improper input validation. The attack can be launched remotely. The exploit has been made public and could be used.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-20
Published	2026-11-04
Last modified	2026-11-04

Publisher (CNA): VulDB · Vendor: npc-worldwide · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-04 21:15 UTCPublished CVE record published
2026-11-04 21:15 UTCUpdated Record last modified

npc-worldwide npcpy DOWNGRADE

Affected: 2.1.0 · 2.1.1 · 2.1.2 · 2.1.3 · 2.1.4 · 2.1.5 · 2.1.6 · 2.1.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.1.0 (Debian / Ubuntu)

apt-cache madison npcpy sudo apt install npcpy=<VERSION_BEFORE_2.1.0> sudo apt-mark hold npcpy

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list npcpy sudo dnf downgrade npcpy-<VERSION_BEFORE_2.1.0> sudo dnf versionlock add npcpy

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-122015?

npcpy: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-122015 being exploited?

CVE-2026-122015 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-2026-122015 affect?

CVE-2026-122015 affects npcpy. Severity is medium (CVSS 6.3). A vulnerability was found in NPC-Worldwide npcpy up to 2.1.27. This vulnerability affects the function get_mlx_response of the file npcpy/gen/response.py of the component MLX Provider. The manipulation of the argument model results in impro

How urgent is CVE-2026-122015?

Priority 22/100. No elevated risk signals yet.

References

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