CVE-2026-43903: OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant

Routine

HIGH 7.8UPGRADE

CVE-2026-43903 is a high-severity flaw (CVSS 7.8) affecting openimageio. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, sgiinput.cpp:265,274 use OIIO_DASSERT for bounds checking in the RLE decode loop. In release builds, OIIO_DASSERT compiles to ((void)sizeof(x)) (dassert.h:210), making all bounds checks no-ops. A crafted .sgi file with RLE count exceeding scanline width causes heap buffer overflow and cr

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-05-14
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: openimageio

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-14 20:17 UTCPublished CVE record published
2026-10-26 14:10 UTCUpdated Record last modified

openimageio openimageio UPGRADE

Affected: < 3.0.18.0 · >= 3.1.4.0 and < 3.1.13.0

Fixed in: 3.0.18.0, 3.1.13.0

Safe to downgrade to: a release before 3.1.4.0

1. Check installed version

apt-cache policy openimageio || rpm -q openimageio || openimageio --version

2. UPGRADE to 3.0.18.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openimageio

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openimageio

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.1.4.0 (Debian / Ubuntu)

apt-cache madison openimageio sudo apt install openimageio=<VERSION_BEFORE_3.1.4.0> sudo apt-mark hold openimageio

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list openimageio sudo dnf downgrade openimageio-<VERSION_BEFORE_3.1.4.0> sudo dnf versionlock add openimageio

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-43903?

openimageio: upgrade to 3.0.18.0, 3.1.13.0. Exact commands for each OS are on this page.

Is CVE-2026-43903 being exploited?

CVE-2026-43903 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-43903 affect?

CVE-2026-43903 affects openimageio. Severity is high (CVSS 7.8). OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, sgiinput.cpp:265,274 use OIIO_DASSERT for bounds checking in the RLE decode lo

How urgent is CVE-2026-43903?

Priority 28/100. High severity

Related CVEs

CVE-2026-43908 HIGH 8.8 UPGRADE OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant
CVE-2026-43909 HIGH 8.8 UPGRADE OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant
CVE-2026-43904 HIGH 7.8 UPGRADE OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant
CVE-2026-43905 HIGH 7.8 UPGRADE OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant
CVE-2026-43906 HIGH 7.8 UPGRADE OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant

References

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