# CVE-2026-59189: OpenEXR: Out-of-bounds read in DeepImageChannel::row() for non-zero dataWindow origin

> An out-of-bounds read in OpenEXRUtil allows attackers to cause crashes or disclose information via crafted deep images with non-zero dataWindow origins.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 25 Aug 2026
- **Updated:** 25 Aug 2026
- **Also known as:** AZL-97637, BELL-CVE-2026-59189, DEBIAN-CVE-2026-59189, ECHO-ec93-6da5-dcb2, GHSA-hwmv-39v6-739m, MINI-56hf-r542-h779, ROOT-OS-DEBIAN-11-CVE-2026-59189, ROOT-OS-DEBIAN-12-CVE-2026-59189, ROOT-OS-DEBIAN-13-CVE-2026-59189, UBUNTU-CVE-2026-59189

## What is CVE-2026-59189?

CVE-2026-59189 is a high-severity memory corruption vulnerability in AcademySoftwareFoundation openexr, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In OpenEXRUtil versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.12, the documented TypedDeepImageChannel<T>::row() API can return an out-of-bounds pointer when a deep image has a non-zero dataWindow origin, resulting in a heap out-of-bounds read and crash, with potential information disclosure under a controlled heap layout. The flaw arises because ImfDeepImageChannel uses two conflicting coordinate models: at(x, y) uses absolute coordinates (with _base offset by dataWindow.min), while row(r) is documented as 0-based logical access. For a non-zero dataWindow.min, row(0) therefore points outside the _sampleListPointers allocation instead of at the first logical row. This issue is fixed in versions 3.3.13 and 3.4.13.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2026-59189?


## How do I fix CVE-2026-59189?

Upgrade to a fixed version.

## Is CVE-2026-59189 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59189 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-59189 and fix it if it is affected.

What it is: CVE-2026-59189 is a high-severity memory corruption vulnerability in AcademySoftwareFoundation openexr, published on 25 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59189 exists.

Affected product: AcademySoftwareFoundation openexr. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-59189/ (Markdown: https://insights.sbomify.com/CVE-2026-59189/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-59189
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-59189
- OSV: https://osv.dev/vulnerability/CVE-2026-59189

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-59189/
Summaries are generated and may contain mistakes; the official description above is the record.