# CVE-2026-39919

## Summary

- **CVE ID:** CVE-2026-39919
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-122
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

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.

## Affected Products

- Artifex Software — Ghostscript (0)

## References

- [CNA](https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/tag/gs10080)
- [CNA](https://github.com/ArtifexSoftware/ghostpdl/commit/0a8bf88e39db07b0751a58d6ec1cf992073e4dc1)
- [CNA](https://bugs.ghostscript.com/show_bug.cgi?id=709666)
- [CNA](https://www.vulncheck.com/advisories/ghostscript-heap-buffer-overflow-via-jpeg-2000-output-adapter)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.49%
- **EPSS Percentile:** 40.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._