CVE-2026-45696
OpenEXR ht_undo_impl overflow allows DoS via crafted EXR files
Is CVE-2026-45696 being exploited?
Not confirmed. CVE-2026-45696 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 0.42% probability of exploitation in the next 30 days.
How severe is CVE-2026-45696?
CVE-2026-45696 is rated High with a CVSS score of 8.3. 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-2026-45696?
Yes. A fix has been recorded for CVE-2026-45696. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45696 affect?
CVE-2026-45696 affects OpenEXR 3.4.0-3.4.11, HTJ2K decoder (OpenEXRCore). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45696?
Upgrade to OpenEXR 3.4.12+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
DoS via heap overflow in EXR HTJ2K decoder; crash and possible adjacent heap leak from crafted EXR.
Patch when possible
- affected>= 3.4.0 and < 3.4.11
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.