CVE-2026-40494
RLE decode bounds flaw in SAIL TGA codec allows 496-byte heap overwrite.
Is CVE-2026-40494 being exploited?
Not confirmed. CVE-2026-40494 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 0.31% probability of exploitation in the next 30 days.
How severe is CVE-2026-40494?
CVE-2026-40494 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-2026-40494?
Yes. A fix has been recorded for CVE-2026-40494. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-40494 affect?
CVE-2026-40494 affects SAIL library (image processing), TGA codec in SAIL. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-40494?
Upgrade to patched SAIL version with fixed tga.c
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Heap overflow via crafted TGA image; potential remote code execution.
Patch when possible
- affected< 45d48d1f2e8e0d73e80bc1fd5310cb57f4547302
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.