CVE-2026-120859: PyMoDAQ before 4.4.13, and pymodaq_data, pymodaq_gui, and pymodaq_utils before 5.1.15, 5.2.x before 5.2.14, an

Routine

HIGH 7.8UPGRADEUPGRADEUPGRADE

CVE-2026-120859 is a high-severity flaw (CVSS 7.8) affecting pymodaq, pymodaq data, pymodaq gui. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PyMoDAQ before 4.4.13, and pymodaq_data, pymodaq_gui, and pymodaq_utils before 5.1.15, 5.2.x before 5.2.14, and 5.3.x before 5.3.10, contain deserialization of untrusted data and eval injection vulnerabilities that allow attackers to execute arbitrary code by supplying crafted files that a user opens. Attackers can store pickled objects in HDF5 string nodes that StringARRAY.array_to_string() passes to pickle.loads() when the node is browsed or re

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-502, CWE-95
Published	2026-11-05
Last modified	2026-11-05

Publisher (CNA): VulnCheck · Vendor: pymodaq · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-05 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-05 17:14 UTCPublished CVE record published
2026-11-05 17:14 UTCUpdated Record last modified

pymodaq pymodaq UPGRADE

Affected: < 4.4.13

Fixed in: 4.4.13

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.4.13 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pymodaq

Note

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

pymodaq pymodaq data UPGRADE

Affected: < 5.1.15 · >= 5.2.0 and < 5.2.14 · >= 5.3.0 and < 5.3.10

Fixed in: 5.1.15, 5.2.14, 5.3.10

Safe to downgrade to: a release before 5.2.0

1. Check installed version

apt-cache policy pymodaq-data || rpm -q pymodaq-data || pymodaq-data --version

2. UPGRADE to 5.1.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pymodaq-data

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pymodaq-data

Note

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

3. If no update is available yet, DOWNGRADE to a release before 5.2.0 (Debian / Ubuntu)

apt-cache madison pymodaq-data sudo apt install pymodaq-data=<VERSION_BEFORE_5.2.0> sudo apt-mark hold pymodaq-data

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pymodaq-data sudo dnf downgrade pymodaq-data-<VERSION_BEFORE_5.2.0> sudo dnf versionlock add pymodaq-data

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.

pymodaq pymodaq gui UPGRADE

Affected: < 5.1.15 · >= 5.2.0 and < 5.2.14 · >= 5.3.0 and < 5.3.10

Fixed in: 5.1.15, 5.2.14, 5.3.10

Safe to downgrade to: a release before 5.2.0

1. Check installed version

apt-cache policy pymodaq-gui || rpm -q pymodaq-gui || pymodaq-gui --version

2. UPGRADE to 5.1.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pymodaq-gui

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pymodaq-gui

Note

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

3. If no update is available yet, DOWNGRADE to a release before 5.2.0 (Debian / Ubuntu)

apt-cache madison pymodaq-gui sudo apt install pymodaq-gui=<VERSION_BEFORE_5.2.0> sudo apt-mark hold pymodaq-gui

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pymodaq-gui sudo dnf downgrade pymodaq-gui-<VERSION_BEFORE_5.2.0> sudo dnf versionlock add pymodaq-gui

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.

pymodaq pymodaq utils UPGRADE

Affected: < 5.1.15 · >= 5.2.0 and < 5.2.14 · >= 5.3.0 and < 5.3.10

Fixed in: 5.1.15, 5.2.14, 5.3.10

Safe to downgrade to: a release before 5.2.0

1. Check installed version

apt-cache policy pymodaq-utils || rpm -q pymodaq-utils || pymodaq-utils --version

2. UPGRADE to 5.1.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pymodaq-utils

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pymodaq-utils

Note

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

3. If no update is available yet, DOWNGRADE to a release before 5.2.0 (Debian / Ubuntu)

apt-cache madison pymodaq-utils sudo apt install pymodaq-utils=<VERSION_BEFORE_5.2.0> sudo apt-mark hold pymodaq-utils

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pymodaq-utils sudo dnf downgrade pymodaq-utils-<VERSION_BEFORE_5.2.0> sudo dnf versionlock add pymodaq-utils

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-2026-120859?

pymodaq: upgrade to 4.4.13; pymodaq data: upgrade to 5.1.15, 5.2.14, 5.3.10; pymodaq gui: upgrade to 5.1.15, 5.2.14, 5.3.10. Exact commands for each OS are on this page.

Is CVE-2026-120859 being exploited?

CVE-2026-120859 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-2026-120859 affect?

CVE-2026-120859 affects pymodaq, pymodaq data, pymodaq gui. Severity is high (CVSS 7.8). PyMoDAQ before 4.4.13, and pymodaq_data, pymodaq_gui, and pymodaq_utils before 5.1.15, 5.2.x before 5.2.14, and 5.3.x before 5.3.10, contain deserialization of untrusted data and eval injection vulnerabilities that allow attackers to execut

How urgent is CVE-2026-120859?

Priority 27/100. High severity

References

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