CVE-2026-40493
Heap overflow in SAIL PSD LAB decoding (3ch, 16-bit).
Is CVE-2026-40493 being exploited?
Not confirmed. CVE-2026-40493 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-2026-40493?
CVE-2026-40493 is rated Critical with a CVSS score of 9.8. 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-2026-40493?
Yes. A fix has been recorded for CVE-2026-40493. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-40493 affect?
CVE-2026-40493 affects SAIL PSD codec, Applications using SAIL PSD decoding. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-40493?
Apply patch; update libraries; verify image processing workflows.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted PSDs trigger deterministic heap overflow during pixel write; may allow code execution or crash.
Patch when possible