Improper input validation in Slic3r
Priority LOW 33CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
An out-of-bounds read vulnerability exists in the AMF File AMFParserContext::endElement() functionality of Slic3r libslic3r 1.3.0 and Master Commit 92abbc42. A specially crafted AMF file can lead to information disclosure. An attacker can provide a malicious file to trigger this vulnerability.
Why it matters now
EPSS 0.01889 79th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Slic3r | Slic3r libslic3r 1.3.0 , Slic3r libslic3r Master Commit 92abbc42 | — | No fix listed | CNA |
- Slic3r Vendor— Affected Slic3r libslic3r 1.3.0 , Slic3r libslic3r Master Commit 92abbc42 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:slic3r:libslic3r:1.3.0:*:*:*:*:*:*:* | 1.3.0 | Vulnerable | Slic3r |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
- cpe:2.3:a:slic3r:libslic3r:1.3.0:*:*:*:*:*:*:* Versions 1.3.0 Vulnerable ·Slic3r
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2020-28591
- 2026-10-03 Alias added: GHSA-jx3c-cqwp-ww97
References
Sources
- CVE-2020-28591 · CVE Program
- CVE-2020-28591 · NVD
- FIRST EPSS
- GHSA-jx3c-cqwp-ww97 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-28591 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences