What is CVE-2026-48029?

CVE-2026-48029 is a high-severity vulnerability in Struktur Libheif, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-07-22.

How severe is CVE-2026-48029?

High severity. CVSS v3 base score is 7.1 out of 10.

Out-of-bounds Read in Struktur Libheif

CVE-2026-48029

libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.19.0 through 1.21.2 have a heap OOB read in ImageItem_Grid::decode_grid_tile via irot-induced tile-coordinate underflow. Version 1.22.0 fixes the issue.

Vulnerability class: Buffer Overflow

Published 2026-07-22 · last modified 2026-08-06.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.5th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Struktur Libheif
Strukturag Libheif — versions >= 1.19.0, < 1.22.0

Weakness classification (CWE)

References

github.com/strukturag/libheif/security/advisories/GHSA-6x5f-qchq-cxqv (Exploit, Mitigation, Vendor Advisory)
github.com/strukturag/libheif/commit/e523ec0bf379110b7c33d4c159f8b1202d332157 (Patch)

Frequently asked questions

What is CVE-2026-48029?: CVE-2026-48029 is a high-severity vulnerability in Struktur Libheif, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-07-22.
How severe is CVE-2026-48029?: High severity. CVSS v3 base score is 7.1 out of 10.