High severity · published Jul 22, 2026
CVE-2026-48029
libheif: heap OOB read in ImageItem_Grid::decode_grid_tile via irot-induced tile-coordinate underflow
7.1
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libheif · strukturag
>= 1.19.0, < 1.22.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48029
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48029
Patch
https://github.com/strukturag/libheif/commit/e523ec0bf379110b7c33d4c159f8b1202d332157
Mitigation
https://github.com/strukturag/libheif/security/advisories/GHSA-6x5f-qchq-cxqv
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