CVE-2026-41071Public exploitNetwork attack vector

Application crash via unchecked saiz sample count

Published May 22, 2026 · Updated May 22, 2026

Out-of-bounds read in Struktur AG libheif 1.21.2 and earlier allows context-dependent attackers to crash applications via crafted HEIF sequences. The SampleAuxInfoReader constructor trusts the saiz sample count, advances current_chunk beyond the chunks vector, and reads an out-of-range chunk entry. Processing an untrusted sequence is required; the over-read exposes adjacent heap data or terminates the parsing application.

CVSS severity5.1
Medium
EPSS probability0.30%
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 1.21.2 and earlier allows context-dependent attackers to crash applications via crafted HEIF sequences. The SampleAuxInfoReader constructor trusts the saiz sample count, advances current_chunk beyond the chunks vector, and reads an out-of-range chunk entry. Processing an untrusted sequence is required; the over-read exposes adjacent heap data or terminates the parsing application.

The record

CVE
CVE-2026-41071
Published
May 22, 2026
Updated
May 22, 2026
Vendor
Struktur AG
Product
libheif
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 2026CVE publishedPublication date reported by the CVE source.
  2. May 22, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Struktur AG · libheifversion=< 1.22.0

Published CVSS scores

5.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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.

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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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