CVE-2026-39886 — Out-of-Bounds $1
CVE-2026-39886 — OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. Versions 3.4.0 through 3.4.9 have a signed integer overflow vulnerability in OpenEXR's HTJ2K (High-Throughput JPEG 2000) decompression pat
What This Means For You
- If your environment is affected by CWE-190, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-39886 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
Free Tier: OpenEXR HTJ2K Integer Overflow Attempt — CVE-2026-39886
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-39886 | vulnerability | CVE-2026-39886 |
| CWE-190 | weakness | CWE-190 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 21, 2026 at 05:16 UTC |
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