CRITICAL CWE-122
CVE-2026-39919
Ghostscript < 10.08.0 Heap Buffer Overflow via JPEG 2000 Output Adapter
Artifex Software·Ghostscript
9.8/ 10
CVSS 3.1
Critical severity
0.85%
EPSS exploit odds
Chance of exploitation in the next 30 days
Higher than 59% of all CVEs
Not listed
CISA KEV catalog
No confirmed in-the-wild exploitation on CISA's list.
Timeline
- Published
- Sep 15, 2026
- Updated
- Oct 1, 2026
- First covered
- Oct 13, 2026
- Latest story
- 1 month ago
Summary
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.
CWE-122Heap-based Buffer Overflow
Attack profile
Attack vectorNetwork
ComplexityLow
PrivilegesNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
- Artifex Software Ghostscriptbefore 10.08.0