CVE-2026-43909
CVE-2026-43909 is a high-severity vulnerability in Openimageio with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
- EPSS exploit prediction: 0% (29th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-30415
- 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, a signed 32-bit integer overflow in the loop index expression i * 4 inside SwapRGBABytes() causes the function to compute a large negative pointer offset when processing kABGR DPX images with large dimensions. The immediate crash is an out-of-bounds read (the memcpy at line 45 reads from &input[i * 4] first), but the subsequent write operations at lines 46–49 target the same wrapped offset — making this a combined OOB read+write primitive. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
Frequently asked questions
- What is CVE-2026-43909?
- 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, a signed 32-bit integer overflow in the loop index expression i * 4 inside SwapRGBABytes() causes the function to compute a large negative pointer offset when processing kABGR DPX images with large dimensions. The immediate crash is an out-of-bounds read (the memcpy at line 45 reads from &input[i * 4] first), but the subsequent write operations at lines 46–49 target the same wrapped offset — making this a combined OOB read+write primitive. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
- How severe is CVE-2026-43909?
- CVE-2026-43909 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-43909 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-43909?
- CVE-2026-43909 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-2026-43909?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-43909 have an EU (EUVD) identifier?
- Yes. CVE-2026-43909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30415.
- When was CVE-2026-43909 published?
- CVE-2026-43909 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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