What is CVE-2026-84447?

CVE-2026-84447 is a high-severity vulnerability in Strukturag Libheif, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-09-18.

How severe is CVE-2026-84447?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Strukturag Libheif

CVE-2026-84447

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 v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Strukturag Libheif — versions < 1.23.2

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-84447?: CVE-2026-84447 is a high-severity vulnerability in Strukturag Libheif, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-09-18.
How severe is CVE-2026-84447?: High severity. CVSS v3 base score is 7.5 out of 10.