8.4

CVE-2026-43903: academysoftwarefoundation openimageio Out-of-bounds Write

CVSS: 8.4v4.0HighAnalyzed
AliasesUBUNTU-CVE-2026-43903DEBIAN-CVE-2026-43903
Published 14-05-2026Last modified 14-05-2026
Open JSON

Vulnerability summary

CVE-2026-43903 is a high (CVSS 8.4) Out-of-bounds Write vulnerability in academysoftwarefoundation openimageio. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.9% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.4/10
010
High · v4.0 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
USN-8438-1

Timeline

  1. 14-05-2026
    PublishedVulnerability first disclosed.
  2. 14-05-2026
    Last modifiedVulnerability information updated.

Description

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 crash. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

+0.04 pp

From 0.13% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Academysoftwarefoundation1 product
Debian1 product
  • openimageioAll versions (No fix recorded) | < 3.1.18.0+dfsg-2
Openimageio1 product
Ubuntu1 product
  • openimageio< 1.6.11~dfsg0-1ubuntu1+esm2 | < 1.7.17~dfsg0-1ubuntu2+esm1 | < 2.1.12.0~dfsg0-1ubuntu0.1~esm1 | All versions (No fix recorded) | < 2.4.17.0+dfsg-1.1ubuntu0.1~esm1 | < 2.5.19.1+dfsg-2ubuntu0.1~esm1

4 vendors · 4 products

References

4 links