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CVE-2026-51807 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

Heap-based out-of-bounds write in j2k_precinct_subband::parse_packet_header() in OpenHTJ2K versions 0.18.3 and earlier (fixed in v0.18.4) caused by missing bounds validation before coding-pass lengths are written to j2k_codeblock::pass_length[128]. A crafted JPEG 2000 codestream containing malformed PPM packet headers can trigger a heap-based out-of-bounds write in j2k_precinct_subband::parse_packet_header() in source/core/coding/coding_units.cpp due to missing bounds validation for the j2k_codeblock::pass_length[128] array which can lead to heap corruption and process termination.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: CISA-ADPCVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/osamu620/OpenHTJ2K/blob/main/CHANGELOG	[email protected]	Release NotesVendor
https://github.com/osamu620/OpenHTJ2K/commit/0778b93	[email protected]	Source CodeVendor
https://github.com/osamu620/OpenHTJ2K/compare/0778b93...v0.18.4	[email protected]
https://github.com/osamu620/OpenHTJ2K/releases	[email protected]	BundleRelease NotesVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-121	Stack-based Buffer Overflow	CISA-ADP

Affected Products

Product	Versions
OpenHTJ2K	<= 0.18.4 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 0.19.0moderate effort Upgrade: 0.18.5moderate effort

Change History

3 change records found show changes

Date	Action	Recorded By
Jul 17, 2026	CVE Modified	[email protected]
Jul 15, 2026	CVE Modified	CISA-ADP
Jul 14, 2026	New CVE Received	[email protected]