High 7.8Published May 13, 2021

CVE-2020-27823A flaw was found in OpenJPEG’s encoder.

Updated under an hour ago (Nov 2, 2026, 1:40 AM ET)

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It affects uclouvain openjpeg and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Start free and add your stackFree account, 3 products Every CVE for uclouvain openjpeg Exploited in the last 30 days

A flaw was found in OpenJPEG’s encoder. This flaw allows an attacker to pass specially crafted x,y offset input to OpenJPEG to use during encoding. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-20, CWE-120, CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

uclouvain openjpeg uclouvain:openjpeg	before 2.4.0	NVD
fedoraproject fedora fedoraproject:fedora	32; 33	NVD
debian debian_linux debian:debian_linux	9.0; 10.0	NVD

References

References

https://bugzilla.redhat.com/show_bug.cgi?id=1905762	issue-tracking, patch, third-party-advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.html	mailing-list, third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQR4EWRFFZQDMFPZKFZ6I3USLMW6TKTP/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCXJOL6MUCRV/
https://www.debian.org/security/2021/dsa-4882	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.