CVE-2026-62292Public exploitNetwork attack vector

Application crash via wrapped tile range check

Published Aug 18, 2026 · Updated Aug 25, 2026

Out-of-bounds read in Struktur AG libheif 1.19.0 through 1.23.2 allows attackers to crash tile-decoding applications via a crafted HEIF file. In unc_decoder::get_compressed_image_data_uncompressed(), a 64-bit tile-offset addition wraps to zero, bypassing the bounds check before memcpy receives an invalid source pointer and a one-terabyte length. The crafted file must advertise a large uncompressed zlib tile grid, and the application must request a high-index advertised tile; merely opening the file or decoding only the whole image does not reach the demonstrated crash.

CVSS severity8.7
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Struktur AG libheif 1.19.0 through 1.23.2 allows attackers to crash tile-decoding applications via a crafted HEIF file. In unc_decoder::get_compressed_image_data_uncompressed(), a 64-bit tile-offset addition wraps to zero, bypassing the bounds check before memcpy receives an invalid source pointer and a one-terabyte length. The crafted file must advertise a large uncompressed zlib tile grid, and the application must request a high-index advertised tile; merely opening the file or decoding only the whole image does not reach the demonstrated crash.

The record

CVE
CVE-2026-62292
Published
Aug 18, 2026
Updated
Aug 25, 2026
Vendor
Struktur AG
Product
libheif
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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=>= 1.19.0, < 1.23.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Struktur AG · libheifversion=>= 1.19.0, < 1.23.1

Published CVSS scores

8.7GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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.

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No observations available

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

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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