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CVE-2026-59156— OpenImageIO: Unbounded recursion in FITS header parser leads to stack overflow

Quick assessment

Affected
AcademySoftwareFoundation OpenImageIO
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, A crafted fits stream containing consecutive 2880-byte header blocks without the m

CVSS 6.5 · Medium

Affected Version Matrix 3

VendorProduct Version RangeStatus
AcademySoftwareFoundation OpenImageIO < 3.0.20.0 affected
>= 3.1.0.0, < 3.1.15.0 affected
>= 3.2.0.0-dev, < 3.2.0.3-beta1 affected
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I. Basic Information for CVE-2026-59156

Vulnerability Information

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Vulnerability Title
OpenImageIO: Unbounded recursion in FITS header parser leads to stack overflow
Source: CVE Program / CVE List V5
Vulnerability Description
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, A crafted fits stream containing consecutive 2880-byte header blocks without the mandatory end keyword makes fitsinput::read_fits_header() call itself without a depth bound. repeated recursive parsing exhausts the application stack, resulting in denial of service. The affected implementation is identified by src/fits.imageio/fitsinput.cpp, FitsInput::read_fits_header(), END keyword, and 2880-byte FITS header blocks, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AcademySoftwareFoundation OpenImageIO < 3.0.20.0 -

II. Public POCs for CVE-2026-59156

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III. Intelligence Information for CVE-2026-59156

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Patches & Fixes for CVE-2026-59156 (2)

Other References for CVE-2026-59156 (3)

Same Patch Batch · AcademySoftwareFoundation · 2026-09-18 · 11 CVEs total

CVE-2026-63638 8.3 HIGH OpenImageIO: Cineon invalid bit depth heap out-of-bounds write
CVE-2026-63422 7.8 HIGH OpenImageIO OpenEXR plugin partial edge tile heap out-of-bounds write
CVE-2026-63419 7.8 HIGH OpenImageIO: IFF ZBUFFER tile read writes past caller tile buffer
CVE-2026-67549 7.6 HIGH OpenImageIO: TIFF 1-bit CMYK bit conversion heap out-of-bounds write
CVE-2026-59956 6.1 MEDIUM OpenImageIO: Heap-buffer-overread in IffInput::readimg() when ZBUFFER flag is set
CVE-2026-59181 6.1 MEDIUM OpenImageIO: Stack buffer overflow in OpenImageIO Cineon reader via unchecked numberOfElem
CVE-2026-63420 5.5 MEDIUM OpenImageIO: PSD RawColor indexed image out-of-bounds read in `interleave_row`
CVE-2026-63635 5.5 MEDIUM OpenImageIO: PSD RawColor invalid color mode causes global out-of-bounds read and allocati
CVE-2026-65969 5.5 MEDIUM OpenImageIO: TGA-to-GIF palette split signed overflow causes SIGSEGV
CVE-2026-65970 5.3 MEDIUM OpenImageIO: TIFF multithreaded scanline read use-after-scope in `TIFFInput::read_native_s

IV. Related Vulnerabilities

Same product: OpenImageIO
Same vendor: AcademySoftwareFoundation
Same weakness: CWE-674

V. Comments for CVE-2026-59156

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