CVE-2026-33509: pyLoad is a free and open-source download manager written in Python

Q: How do I fix CVE-2026-33509?

pyload: upgrade to newer than 0.4.20; pyload-ng: upgrade to 0.5.0b3.dev97. Exact commands for each OS are on this page.

Q: Is CVE-2026-33509 being exploited?

CVE-2026-33509 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-2026-33509 affect?

CVE-2026-33509 affects pyload, pyload-ng. Severity is high (CVSS 7.5). pyLoad is a free and open-source download manager written in Python. From version 0.4.0 to before version 0.5.0b3.dev97, the set_config_value() API endpoint allows users with the non-admin SETTINGS permission to modify any configuration opt

Q: How urgent is CVE-2026-33509?

Priority 43/100. High severity; Public exploit reference

This month

HIGH 7.5UPGRADEUPGRADE

CVE-2026-33509 is a high-severity flaw (CVSS 7.5) affecting pyload, pyload-ng. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

pyLoad is a free and open-source download manager written in Python. From version 0.4.0 to before version 0.5.0b3.dev97, the set_config_value() API endpoint allows users with the non-admin SETTINGS permission to modify any configuration option without restriction. The reconnect.script config option controls a file path that is passed directly to subprocess.run() in the thread manager's reconnect logic. A SETTINGS user can set this to any executab

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-269
Published	2026-03-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: pyload · pyload-ng project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-24 20:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

pyload pyload UPGRADE

Affected: >= 0.4 and <= 0.4.20

Fixed in: newer than 0.4.20

Safe to downgrade to: a release before 0.4

1. Check installed version

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

2. UPGRADE to newer than 0.4.20 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pyload

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 0.4 (Debian / Ubuntu)

apt-cache madison pyload sudo apt install pyload=<VERSION_BEFORE_0.4> sudo apt-mark hold pyload

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

dnf --showduplicates list pyload sudo dnf downgrade pyload-<VERSION_BEFORE_0.4> sudo dnf versionlock add pyload

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.

pyload-ng project pyload-ng UPGRADE

Affected: >= 0.5.0a5.dev528 and < 0.5.0b3.dev97

Fixed in: 0.5.0b3.dev97

Safe to downgrade to: a release before 0.5.0a5.dev528

1. Check installed version

pip show pyload-ng

2. UPGRADE to 0.5.0b3.dev97

pip install --upgrade "pyload-ng>=0.5.0b3.dev97"

3. If no update is available yet, DOWNGRADE to a release before 0.5.0a5.dev528

pip index versions pyload-ng pip install "pyload-ng<0.5.0a5.dev528"

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-2026-33509?

pyload: upgrade to newer than 0.4.20; pyload-ng: upgrade to 0.5.0b3.dev97. Exact commands for each OS are on this page.

Is CVE-2026-33509 being exploited?

CVE-2026-33509 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-2026-33509 affect?

CVE-2026-33509 affects pyload, pyload-ng. Severity is high (CVSS 7.5). pyLoad is a free and open-source download manager written in Python. From version 0.4.0 to before version 0.5.0b3.dev97, the set_config_value() API endpoint allows users with the non-admin SETTINGS permission to modify any configuration opt

How urgent is CVE-2026-33509?

Priority 43/100. High severity; Public exploit reference

Software pages

Python vulnerabilities

Related CVEs

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CVE-2026-35464 HIGH 7.5 UPGRADE pyLoad is a free and open-source download manager written in Python
CVE-2026-33992 MEDIUM 6.5 DOWNGRADE pyLoad is a free and open-source download manager written in Python

References

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