Medium 6.6Published Aug 5, 2025

CVE-2025-54874OpenJPEG allows OOB heap memory write in opj_jp2_read_header

Updated under an hour ago (Nov 2, 2026, 12:23 AM ET)

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No exploitation reported and no EPSS estimate yet.

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OpenJPEG is an open-source JPEG 2000 codec. In OpenJPEG from 2.5.1 through 2.5.3, a call to opj_jp2_read_header may lead to OOB heap memory write when the data stream p_stream is too short and p_image is not initialized.

CVSS: 6.6 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Weakness (CWE): CWE-457
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Feb 26, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

uclouvain openjpeg uclouvain:openjpeg (from the name)	from 2.5.1, <= 2.5.3	CNA record
uclouvain openjpeg uclouvain:openjpeg	through 2.5.3	NVD

References

References

https://github.com/uclouvain/openjpeg/commit/f809b80c67717c152a5ad30bf06774f00da4fd2d	x-refsource-confirm, patch
https://github.com/uclouvain/openjpeg/pull/1573	x-refsource-misc, third-party-advisory
https://securitylab.github.com/advisories/GHSL-2025-057_OpenCV	x-refsource-misc, exploit, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.