CVE WatchAug 25, 2026

CVE-2026-68516

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version

CVSS

6.5

Medium

EPSS

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KEV

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Exploit Today

0-100

Published: Aug 24, 2026 · Last modified: Aug 25, 2026 · CWE-121 · CWE-787

EPSS · 30d

Not enough EPSS history yet.

Technical description

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.

Official references

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