CVE-2026-34589

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Source
https://cve.org/CVERecord?id=CVE-2026-34589
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-34589.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-34589
Aliases
Downstream
Related
Published
2026-04-06T15:33:03.276Z
Modified
2026-05-28T03:53:50.261582452Z
Severity
  • 8.4 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write
Details

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.

Database specific 
{
    "cwe_ids": [
        "CWE-190",
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34589.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/academysoftwarefoundation/openexr

Affected ranges

Type
GIT
Repo
https://github.com/academysoftwarefoundation/openexr
Events
Introduced
20a65852895894434bea88613f6d29ac8e88bd6e
Fixed
b5fa98ac6b5fc660c0295123c1d02bbf687dbec3

Affected versions

v3.*
v3.4.0
v3.4.1
v3.4.1-rc
v3.4.1-rc2
v3.4.2
v3.4.2-rc
v3.4.2-rc2
v3.4.3
v3.4.3-rc
v3.4.3-rc2
v3.4.3-rc3
v3.4.4
v3.4.4-rc
v3.4.4-rc2
v3.4.5
v3.4.5-rc
v3.4.6
v3.4.6-rc
v3.4.7
v3.4.7-rc
v3.4.8
v3.4.8-rc
v3.4.9-rc

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-34589.json"