CVE-2026-47709

🔶 medium

Summary

libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API `heif_image_handle_get_image_tiling()` when a malformed uncompressed HEIF image item has an associated `uncC` property but no associated `ispe` property. In debug builds this trips the `ispe && uncC` assertion in `ImageItem_uncompressed::get_heif_image_tiling()`. In a release/NDEBUG ASan build, the same file causes a null pointer read at address `0xa8`. Version 1.22.0 fixes the issue.

CVSS Score

5.5

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 31.5% of all 349,016 vulnerabilities in our database.

#238,911

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Jul 22, 2026

🔍 Exploitation Status

Poc

Proof-of-concept available

⚙️ 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:N/I:N/A:H

CVSS Vector 4.0

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE IDs (Weakness Types)

CWE-476

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
struktur	libheif	Affected	< 1.22.0

🔗 References 3

https://github.com/strukturag/libheif/issues/1802

Exploit Issue Tracking Third Party Advisory

https://github.com/strukturag/libheif/pull/1806

Exploit Issue Tracking Patch Third Party Advisory

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

Exploit Vendor Advisory Mitigation

🔗 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-2026-47178	🔶 medium	6.1	0.2	libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.19.0 through 1.21.2, a crafted HEIF file (unco...	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

These CVEs affect the same products