CVE-2020-28599: A stack-based buffer overflow vulnerability exists in the import_stl.cc:import_stl() functionality of Openscad

Q: How do I fix CVE-2020-28599?

openscad: upgrade to newer than 2021.01; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2020-28599 being exploited?

CVE-2020-28599 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-2020-28599 affect?

CVE-2020-28599 affects openscad, fedora. Severity is high (CVSS 7.8). A stack-based buffer overflow vulnerability exists in the import_stl.cc:import_stl() functionality of Openscad openscad-2020.12-RC2. A specially crafted STL file can lead to code execution. An attacker can provide a malicious file to trigge

Q: How urgent is CVE-2020-28599?

Priority 52/100. High severity; Public exploit reference

This month

HIGH 7.8UPGRADEMITIGATE

CVE-2020-28599 is a high-severity flaw (CVSS 7.8) affecting openscad, fedora. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stack-based buffer overflow vulnerability exists in the import_stl.cc:import_stl() functionality of Openscad openscad-2020.12-RC2. A specially crafted STL file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.0% (top 20%)
CISA exploited list	No
Weakness	CWE-121, CWE-787
Published	2021-02-24
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: fedoraproject · openscad

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

Am I affected?

Timeline

2021-02-24 16:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

openscad openscad UPGRADE

Affected: <= 2021.01

Fixed in: newer than 2021.01

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2021.01 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openscad

Note

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

fedoraproject fedora MITIGATE

Affected: 32 · 33

Fixed in: no fixed release known

Safe to downgrade to: a release before 32

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2020-28599?

openscad: upgrade to newer than 2021.01; fedora: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-28599 being exploited?

CVE-2020-28599 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-2020-28599 affect?

CVE-2020-28599 affects openscad, fedora. Severity is high (CVSS 7.8). A stack-based buffer overflow vulnerability exists in the import_stl.cc:import_stl() functionality of Openscad openscad-2020.12-RC2. A specially crafted STL file can lead to code execution. An attacker can provide a malicious file to trigge

How urgent is CVE-2020-28599?

Priority 52/100. High severity; Public exploit reference

Related CVEs

CVE-2022-0497 HIGH 7.1 UPGRADE A vulnerbiility was found in Openscad, where a .scad file with no trailing newline could cause an out-of-bound
CVE-2022-0496 MEDIUM 5.5 UPGRADE A vulnerbiility was found in Openscad, where a DXF-format drawing with particular (not necessarily malformed!)
CVE-2020-28600 HIGH 7.8 DOWNGRADE An out-of-bounds write vulnerability exists in the import_stl.cc:import_stl() functionality of Openscad opensc

References

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