CVE-2026-51807

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/osamu620/OpenHTJ2K/blob/main/CHANGELOG
https://github.com/osamu620/OpenHTJ2K/commit/0778b93
https://github.com/osamu620/OpenHTJ2K/compare/0778b93...v0.18.4
https://github.com/osamu620/OpenHTJ2K/releases

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-14 23:17

Updated : 2026-07-17 16:17

NVD link : CVE-2026-51807

Mitre link : CVE-2026-51807

CVE.ORG link : CVE-2026-51807

JSON object : View

Products Affected

No product.

CWE

CWE-121

Stack-based Buffer Overflow

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