CVE-2026-39919 | defend.network

What is CVE-2026-39919?

Ghostscript before 10.08.0 contains a heap-based buffer overflow vulnerability in the JPEG 2000 output adapter (base/sjpx_openjpeg.c) that allows attackers to cause memory corruption by supplying a crafted PDF containing a JPEG 2000 image with mismatched component subsampling factors. When image components declare different subsampling values, the non-samescale sub-byte-depth output path allocates a row buffer sized for packed output but writes a full byte per output column regardless of bit depth, overflowing the allocation and corrupting internal chunk-allocator metadata to achieve code execution.

CVSS9.8 NVD 3.1

SeverityCRITICAL

ExploitationNo exploitation reported

EPSS1% · P55

Triage statusNo Known Exploit

ActionPatch within 48 hours

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWECWE-122

NVD published2026-09-15

NVD last modified2026-09-24

Timeline

2026-09-15Published to the U.S. National Vulnerability Database (NVD)
2026-09-24NVD record last updated

Affected product

See advisory

Remediation Steps

Apply the Ghostscript security patch addressing the heap buffer overflow vulnerability
Restrict upload and processing of PDF files from untrusted sources
Implement input validation and sandboxing for PDF processing operations
Review and update document processing workflows to minimize exposure to malicious PDF files

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 2 of October 2026 (October 12 – 18)

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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.