CVE-2019-7537: An issue was discovered in Donfig 0.3.0

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2019-7537 is a critical-severity flaw (CVSS 9.8) affecting donfig. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Donfig 0.3.0. There is a vulnerability in the collect_yaml method in config_obj.py. It can execute arbitrary Python commands, resulting in command execution.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.4% (top 11%)
CISA exploited list	No
Weakness	CWE-77
Published	2019-03-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pytroll

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

Am I affected?

Timeline

2019-03-21 20:29 UTCPublished CVE record published
2026-06-17 02:40 UTCUpdated Record last modified

pytroll donfig DOWNGRADE

Affected: 0.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.3.0 (Debian / Ubuntu)

apt-cache madison donfig sudo apt install donfig=<VERSION_BEFORE_0.3.0> sudo apt-mark hold donfig

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

dnf --showduplicates list donfig sudo dnf downgrade donfig-<VERSION_BEFORE_0.3.0> sudo dnf versionlock add donfig

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-2019-7537?

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

Is CVE-2019-7537 being exploited?

CVE-2019-7537 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-2019-7537 affect?

CVE-2019-7537 affects donfig. Severity is critical (CVSS 9.8). An issue was discovered in Donfig 0.3.0. There is a vulnerability in the collect_yaml method in config_obj.py. It can execute arbitrary Python commands, resulting in command execution.

How urgent is CVE-2019-7537?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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