CVE-2026-47709Public exploit

Application crash via missing-property null dereference

Published Jul 21, 2026 · Updated Jul 21, 2026

NULL pointer dereference in libheif before 1.22.0 allows local users to crash applications via a malformed uncompressed HEIF file. ImageItem_uncompressed::get_heif_image_tiling() assumes paired uncC and ispe properties, then reads ispe after release builds remove the assertion. An application must call the tiling API on attacker-supplied input; the demonstrated consequence is process termination, with no arbitrary read, write, or code execution.

CVSS severity6.9
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in libheif before 1.22.0 allows local users to crash applications via a malformed uncompressed HEIF file. ImageItem_uncompressed::get_heif_image_tiling() assumes paired uncC and ispe properties, then reads ispe after release builds remove the assertion. An application must call the tiling API on attacker-supplied input; the demonstrated consequence is process termination, with no arbitrary read, write, or code execution.

The record

CVE
CVE-2026-47709
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Struktur AG
Product
libheif
Classifications
CWE-476, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.22.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Struktur AG · libheifversion=< 1.22.0

Published CVSS scores

6.9GitHub, Inc.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
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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