CVE-2023-39327 | Openjpeg: malicious files can cause the program to enter a large loop

A flaw was found in OpenJPEG. Maliciously constructed pictures can cause the program to enter a large loop and continuously print warning messages on the terminal.

Published: 2024-07-13 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-39327 is rated Low Risk (31.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.50%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-39327

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.04% 0.50% +0.46%
2 2026-03-21 0.05% 0.04% -0.02%
3 2026-03-10 — 0.05% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-39327

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 1.4 [email protected]

Weakness enumeration for CVE-2023-39327

OS Trackers for CVE-2023-39327

vendor priority summary link
debian not yet assigned CVE-2023-39327 not yet assigned priority: Debian including 1 source packages (openjpeg2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2023-39327
redhat low — https://access.redhat.com/security/cve/CVE-2023-39327
suse low CVE-2023-39327 severity low: SUSE including 257 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 334 product×package rows across 37 product lines (Image SL-Micro-Azure, Image SL-Micro-BYOS-Azure, … (37 product lines)): Known Affected 231, Fixed 92, Known Not Affected 6, First Fixed 5. https://www.suse.com/security/cve/CVE-2023-39327/
ubuntu medium CVE-2023-39327 medium priority: Ubuntu including 7 source packages (blender, ghostscript, …), 69 status rows across 11 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 29, DNE 12, released 11, ignored 10, not-affected 7. https://ubuntu.com/security/CVE-2023-39327

Affected software / configurations for CVE-2023-39327

Vendor Product Version Raw CPE
uclouvain openjpeg — cpe:2.3:a:uclouvain:openjpeg:-:*:*:*:*:*:*:*
uclouvain openjpeg 2.0 cpe:2.3:a:uclouvain:openjpeg:2.0:*:*:*:*:*:*:*
uclouvain openjpeg 2.5.0 cpe:2.3:a:uclouvain:openjpeg:2.5.0:*:*:*:*:*:*:*

References for CVE-2023-39327

cvelogic Threat Intelligence