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Vulnerability record · CVE-2026-42216 · published 7 May 2026

CVE-2026-42216: Openexr out-of-bounds read vulnerability

Openexr · Openexr

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed representation. If the previous string is longer than 255 bytes, the next string is expected to begin with a 2-byte prefix length. The code reads stringList[i][0] and stringList[i][1] without checking that the current string has at least two bytes. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.

8.8 CVSS 4.0 High EPSS 0.71% · top 48.3% CWE-125 · Out-of-bounds readCWE-130 · CWE-130
8.8CVSS 4.0 base score
0.71%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
11References, 2 tagged exploit
15 Jul 2026Last modified by NVD

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed representation. If the previous string is longer than 255 bytes, the next string is expected to begin with a 2-byte prefix length. The code reads stringList[i][0] and stringList[i][1] without checking that the current string has at least two bytes. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-65j8-95g9-jgj4 ExploitMitigationVendor Advisory
https://access.redhat.com/errata/RHSA-2026:38498
https://access.redhat.com/errata/RHSA-2026:38499
https://access.redhat.com/errata/RHSA-2026:39024
https://access.redhat.com/errata/RHSA-2026:39025
https://access.redhat.com/errata/RHSA-2026:39026
https://access.redhat.com/errata/RHSA-2026:39027
https://access.redhat.com/security/cve/CVE-2026-42216
https://bugzilla.redhat.com/show_bug.cgi?id=2467633
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-65j8-95g9-jgj4 ExploitMitigationVendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42216.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.1CVE-2023-5841Openexr heap-based buffer overflow vulnerabilityDue to a failure in validating the number of scanline samples of a OpenEXR file containing deep scanline data, Academy Software Foundation OpenEX ima…EPSS 1.3%8.8CVE-2026-41142Openexr integer overflow vulnerabilityOpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From…EPSS 0.73%8.8CVE-2021-23169Openexr out-of-bounds write vulnerabilityA heap-buffer overflow was found in the copyIntoFrameBuffer function of OpenEXR in versions before 3.0.1. An attacker could use this flaw to execute …EPSS 2.3%8.8CVE-2017-9111Openexr vulnerabilityIn OpenEXR 2.2.0, an invalid write of size 8 in the storeSSE function in ImfOptimizedPixelReading.h could cause the application to crash or execute a…EPSS 3.2%8.8CVE-2017-9113Openexr vulnerabilityIn OpenEXR 2.2.0, an invalid write of size 1 in the bufferedReadPixels function in ImfInputFile.cpp could cause the application to crash or execute a…EPSS 3.1%8.8CVE-2017-9115Openexr vulnerabilityIn OpenEXR 2.2.0, an invalid write of size 2 in the = operator function in half.h could cause the application to crash or execute arbitrary code.EPSS 3.3%8.7CVE-2026-34543Openexr use of uninitialized resource vulnerabilityOpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From…EPSS 0.52%8.6CVE-2026-34588Openexr out-of-bounds read vulnerabilityOpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From…EPSS 0.57%

Source: NIST National Vulnerability Database (record CVE-2026-42216), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.