CVE-2026-59186

Summary

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D<Rgba> tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.

Affected Software

VendorProductVersion RangeStatus
AcademySoftwareFoundationopenexr< 3.2.11affected
AcademySoftwareFoundationopenexr>= 3.3.0, < 3.3.13affected
AcademySoftwareFoundationopenexr>= 3.4.0, < 3.4.14affected

Weaknesses

  • CWE-122: CWE-122: Heap-based Buffer Overflow
  • CWE-190: CWE-190: Integer Overflow or Wraparound
  • CWE-787: CWE-787: Out-of-bounds Write

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: partial

Additional References

References