CVE-2026-45696Public exploit

Application crash via HTJ2K line-width mismatch

Published Jun 18, 2026 · Updated Jun 18, 2026

Heap-buffer over-read in OpenEXR 3.4.0 through 3.4.11 allows context-dependent attackers to crash applications via crafted EXR files. In ht_undo_impl, the decoder uses the EXR channel width to read cur_line->i32 without validating the smaller OpenJPH line-buffer length. Opening or inspecting the file is required; triggering the flaw crashes the consuming process and can disclose adjacent heap data.

CVSS severity6.5
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Heap-buffer over-read in OpenEXR 3.4.0 through 3.4.11 allows context-dependent attackers to crash applications via crafted EXR files. In ht_undo_impl, the decoder uses the EXR channel width to read cur_line->i32 without validating the smaller OpenJPH line-buffer length. Opening or inspecting the file is required; triggering the flaw crashes the consuming process and can disclose adjacent heap data.

The record

CVE
CVE-2026-45696
Published
Jun 18, 2026
Updated
Jun 18, 2026
Vendor
Academy Software Foundation
Product
OpenEXR
Classifications
CWE-122, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 3.4.0, < 3.4.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Academy Software Foundation · OpenEXRversion=>= 3.4.0, < 3.4.11

Published CVSS scores

6.1Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo