High 7.5Published Sep 18, 2026

CVE-2026-84447libheif: Derived-image indirect reference chains and tiled offsets bypass decode caching and MemoryHandle limits, causing CPU/memory amplification DoS

Updated under an hour ago (2026-10-19 09:40 UTC)

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It affects strukturag libheif. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for strukturag libheif

Exploited in the last 30 days

libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.1 and earlier, crafted grid, iovl, and iden reference graphs can repeatedly decode the same base image because processed_ids is copied per branch and ImageItem::decode_image() has no shared operation budget. This vulnerability is fixed in 1.23.2.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 18, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

strukturag libheif strukturag:libheif (from the name)	before 1.23.2	CNA record

References

https://github.com/strukturag/libheif/security/advisories/GHSA-x8xm-cm2c-cfc8x-refsource-confirm
https://github.com/strukturag/libheif/commit/30b52a4e829efe0ee6d7208e8500b99f664af5e9x-refsource-misc
https://github.com/strukturag/libheif/releases/tag/v1.23.2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.