CVE-2026-43996
CVE-2026-43996 is a medium-severity vulnerability in Openimageio with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (7th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-30417
- Weakness: CWE-125
- Affected product: Openimageio
- Published:
- Last modified:
Description
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Frequently asked questions
- What is CVE-2026-43996?
- OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
- How severe is CVE-2026-43996?
- CVE-2026-43996 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-43996 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-43996?
- CVE-2026-43996 primarily affects Openimageio. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-43996?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-43996 have an EU (EUVD) identifier?
- Yes. CVE-2026-43996 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30417.
- When was CVE-2026-43996 published?
- CVE-2026-43996 was published on 2026-05-14 and last updated on 2026-06-17.
References
Affected products (3)
- cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*
- cpe:2.3:a:openimageio:openimageio:3.2.0.0:dev:*:*:*:*:*:*
- cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev:*:*:*:*:*:*
More vulnerabilities in Openimageio
- CVE-2024-55194 — Critical (CVSS 9.8): OpenImageIO v3.1.0.0dev was discovered to contain a heap overflow via the component /OpenImageIO/fmath.h.
- CVE-2024-55193 — Critical (CVSS 9.8): OpenImageIO v3.1.0.0dev was discovered to contain a segmentation violation via the component /OpenImageIO/string_view.h.
- CVE-2024-55192 — Critical (CVSS 9.8): OpenImageIO v3.1.0.0dev was discovered to contain a heap overflow via the component…
- CVE-2023-42299 — Critical (CVSS 9.8): Buffer Overflow vulnerability in OpenImageIO oiio v.2.4.12.0 allows a remote attacker to execute arbitrary code and…
- CVE-2022-41838 — Critical (CVSS 9.8): A code execution vulnerability exists in the DDS scanline parsing functionality of OpenImageIO Project OpenImageIO…
- CVE-2022-41837 — Critical (CVSS 9.8): An out-of-bounds write vulnerability exists in the OpenImageIO::add_exif_item_to_spec functionality of OpenImageIO…
All CVEs affecting Openimageio →
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