CVE-2026-59181Public exploit

Process crash via unchecked Cineon element count

Published Sep 18, 2026 · Updated Sep 18, 2026

Stack buffer overflow in affected OpenImageIO releases allows attackers to crash image-processing applications via crafted Cineon files. CineonInput::open() trusts the file-supplied numberOfElements value as a loop bound and writes pointers beyond the fixed strings[8] stack array. Exploitation requires an application to open the attacker-supplied file; the documented consequence is adjacent-state corruption and process termination.

CVSS severity6.1
Medium
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in affected OpenImageIO releases allows attackers to crash image-processing applications via crafted Cineon files. CineonInput::open() trusts the file-supplied numberOfElements value as a loop bound and writes pointers beyond the fixed strings[8] stack array. Exploitation requires an application to open the attacker-supplied file; the documented consequence is adjacent-state corruption and process termination.

The record

CVE
CVE-2026-59181
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Academy Software Foundation
Product
OpenImageIO
Classifications
CWE-121, CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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=< 3.0.20.0
  2. Affected versionversion=>= 3.1.0.0, < 3.1.15.0
  3. Affected versionversion=>= 3.2.0.0-dev, < 3.2.0.3-beta1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Academy Software Foundation · OpenImageIOversion=< 3.0.20.0; version=>= 3.1.0.0, < 3.1.15.0; version=>= 3.2.0.0-dev, < 3.2.0.3-beta1

Published CVSS scores

6.1Academy Software FoundationCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File

Public exploit references

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

Technologies

Your stack

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Your stack

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