CVE-2020-29128: petl before 1.68, in some configurations, allows resolution of entities in an XML document.

Q: How do I fix CVE-2020-29128?

petl: upgrade to 1.6.8. Exact commands for each OS are on this page.

Q: Is CVE-2020-29128 being exploited?

CVE-2020-29128 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-2020-29128 affect?

CVE-2020-29128 affects petl. Severity is critical (CVSS 9.8). petl before 1.68, in some configurations, allows resolution of entities in an XML document.

Q: How urgent is CVE-2020-29128?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-29128 is a critical-severity flaw (CVSS 9.8) affecting petl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

petl before 1.68, in some configurations, allows resolution of entities in an XML document.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Weakness	CWE-91
Published	2020-11-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: petl project

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

Am I affected?

Timeline

2020-11-26 05:15 UTCPublished CVE record published
2026-06-17 03:11 UTCUpdated Record last modified

petl project petl UPGRADE

Affected: < 1.6.8

Fixed in: 1.6.8

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.6.8 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade petl

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-2020-29128?

petl: upgrade to 1.6.8. Exact commands for each OS are on this page.

Is CVE-2020-29128 being exploited?

CVE-2020-29128 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-2020-29128 affect?

CVE-2020-29128 affects petl. Severity is critical (CVSS 9.8). petl before 1.68, in some configurations, allows resolution of entities in an XML document.

How urgent is CVE-2020-29128?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

References

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