Heap-based buffer overflow in Diagon
Priority HIGH 69CWE-122Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.
Summary
A heap-based buffer overflow vulnerability exists in the Sequence::DrawText functionality of Diagon v1.0.139. A specially crafted markdown file can lead to arbitrary code execution. A victim would need to open a malicious file to trigger this vulnerability.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00522 44th 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
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Diagon | Diagon | v1.0.139 | — | No fix listed | CNA |
- Diagon VendorDiagon Affected v1.0.139 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:diagon_project:diagon:1.0.139:*:*:*:*:*:*:* | 1.0.139 | Vulnerable | Diagon Project |
- cpe:2.3:a:diagon_project:diagon:1.0.139:*:*:*:*:*:*:* Versions 1.0.139 Vulnerable ·Diagon Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-27390
- 2026-10-03 Alias added: GHSA-4p57-rrmc-hxh2
References
More Diagon Project Diagon vulnerabilities
- TI-2023-14904 Memory corruption in Diagon CVSS 3.1HIGH 7.8
Sources
- CVE-2023-27390 · CVE Program
- CVE-2023-27390 · NVD
- FIRST EPSS
- GHSA-4p57-rrmc-hxh2 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences