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CVE-2026-91186 PNG decoder: a duplicate IHDR chunk after IDAT resizes the image after allocation, causing a heap out-of-bounds write

🗓️ 20 Oct 2026 14:47:52Reported by GoogleType 
osv_cve
 osv_cve
🔗 osv.dev👁 10 Views

Duplicate IHDR chunk in PNG decoder causes heap out-of-bounds write.

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21 Oct 2026 03:00Current
6Medium risk
Vulners AI Score6
CVSS 48.4
10