CVE-2026-47178

🔶 medium

Summary

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.19.0 through 1.21.2, a crafted HEIF file (uncompressed `unci` codec, tiled, component-interleaved, 4:2:0) triggers a heap out-of-bounds write in libheif's uncompressed tile decoder. The write overwrites the C++ vtable pointer of an adjacent `unc_decoder_component_interleave` object; the next virtual call dispatches to an attacker-chosen address. Version 1.22.0 patches the issue.

CVSS Score

6.1

Medium

EPSS Score

0.2

Exploit Probability

Published Date

2026-07-21

First Seen: 2026-07-22

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 37.7% of all 349,016 vulnerabilities in our database.

#217,357

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Jul 22, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

SSVC data provided by CISA

Last Modified 2026-07-27

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

CWE IDs (Weakness Types)

CWE-787

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
struktur	libheif	Affected	> 1.19.0 < 1.22.0

🔗 References 1

https://github.com/strukturag/libheif/security/advis...

Exploit Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-48029	⚠️ high	7.1	0.3	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 Image...	2026-07-22
CVE-2026-47714	🔶 medium	6.1	0.1	libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, the inline mask parsing code i...	2026-07-21
CVE-2026-47247	⚠️ high	7.5	0.5	libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, two bugs in libheif chain to leak p...	2026-07-21
CVE-2026-47251	🔶 medium	6.1	0.2	libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) intro...	2026-07-21
CVE-2026-47254	🔶 medium	6.1	0.2	libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.0, `Track::init_sample_timing_table()`...	2026-07-21
CVE-2026-47709	🔶 medium	5.5	0.2	libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API `heif_i...	2026-07-21

These CVEs affect the same products