CVE-2026-43909
OOB read/write in OpenImageIO SwapRGBABytes() due to 32-bit overflow on large DPX images.
Is CVE-2026-43909 being exploited?
Not confirmed. CVE-2026-43909 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-43909?
CVE-2026-43909 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-43909?
Yes. A fix has been recorded for CVE-2026-43909. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43909 affect?
CVE-2026-43909 affects OpenImageIO < 3.0.18.0, OpenImageIO < 3.1.13.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43909?
Upgrade to 3.0.18.0+ or 3.1.13.0+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
OOB read/write causes memory corruption; may crash app and enable code execution.
Immediate action required
- affected< 3.0.18.0
- affected>= 3.1.4.0-beta and < 3.1.13.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.