High severity · published Aug 25, 2026
CVE-2026-59187
OpenEXR: exrmetrics deep pixelmode heap buffer overflow
7.1
CVSS
0.4%
EPSS
No
On KEV
Description
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13 are vulnerable to a heap out-of-bounds write when exrmetrics reads a crafted deep scanline EXR. This occurs with pixel conversion options such as --pixelmode float or --bench because DeepSlice requests FLOAT output while the backing sample buffers are allocated using the input HALF element size. The issue is fixed in versions 3.3.13 and 3.4.14.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openexr · AcademySoftwareFoundation
>= 3.3.0, < 3.3.13; >= 3.4.0, < 3.4.14 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-59187
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-59187
github.com
https://github.com/AcademySoftwareFoundation/openexr/commit/46e70220dc91dbc1341fac4671704e970b450585
github.com
https://github.com/AcademySoftwareFoundation/openexr/commit/7e772dd704b9b5d6dc2564647d89f7813f608e94
github.com
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-6jj8-cxcr-j8hm
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