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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00371.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a n/a affected
Version Status Constraints
n/a affected —

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/osamu620/OpenHTJ2K/blob/main/CHANGELOG cve-icon
https://github.com/osamu620/OpenHTJ2K/commit/0778b93 cve-icon
https://github.com/osamu620/OpenHTJ2K/compare/0778b93...v0.18.4 cve-icon
https://github.com/osamu620/OpenHTJ2K/releases cve-icon
History

Thu, 23 Jul 2026 04:00:00 +0000

Type Values Removed Values Added
Title Heap-based Out-of-Bounds Write in OpenHTJ2K Leading to Process Termination

Fri, 17 Jul 2026 23:30:00 +0000

Type Values Removed Values Added
Title Buffer Overflow in OpenHTJ2K’s JPEG 2000 Precinct Subband Parsing Allows Arbitrary Code Execution

Fri, 17 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Description Buffer Overflow vulnerability in OpenHTJ2K v.0.18.4 and before allows an attacker to execute arbitrary code via the j2k_precinct_subband::parse_packet_header() in source/core/coding/coding_units.cpp 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.
References

Thu, 16 Jul 2026 08:15:00 +0000

Type Values Removed Values Added
Title Buffer Overflow in OpenHTJ2K’s JPEG 2000 Precinct Subband Parsing Allows Arbitrary Code Execution

Wed, 15 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-121
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 14 Jul 2026 22:45:00 +0000

Type Values Removed Values Added
Description Buffer Overflow vulnerability in OpenHTJ2K v.0.18.4 and before allows an attacker to execute arbitrary code via the j2k_precinct_subband::parse_packet_header() in source/core/coding/coding_units.cpp
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-07-17T15:02:40.362Z

Reserved: 2026-06-08T00:00:00.000Z

Link: CVE-2026-51807

cve-icon Vulnrichment

Updated: 2026-07-15T14:08:07.304Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-23T03:45:04Z

Weaknesses