Is CVE-2026-41069 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-41069 being exploited in the wild.

How severe is CVE-2026-41069?

Medium severity, with a CVSS score of 6.5, published 22 May 2026.

Is there a fix for CVE-2026-41069?

A patch was published on 2026-05-19: Fixed in version 1.22.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-41069 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-41069?

Check whether you run struktur AG Libheif at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-41069: Strukturag libheif out-of-bounds read in SampleAuxInfoReader

CVE-2026-41069 · Severity: medium · CVSS 6.5 · Published 2026-05-22

libheif is a widely used software library for processing HEIF and AVIF image files. A vulnerability in how the library handles malformed image sequences allows an attacker to crash applications that use this library by providing a specially crafted image file. This could lead to a denial-of-service (DoS) condition, affecting the availability of services that process user-uploaded images.

Technologies: struktur AG Libheif. Vendors: struktur AG.

Quick answers

Is CVE-2026-41069 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-41069 being exploited in the wild.
How severe is CVE-2026-41069?: Medium severity, with a CVSS score of 6.5, published 22 May 2026.
Which products and versions are affected?: struktur AG Libheif <= 1.21.2.
Is there a fix for CVE-2026-41069?: A patch was published on 2026-05-19: Fixed in version 1.22.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-41069 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-41069?: Check whether you run struktur AG Libheif at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An out-of-bounds read and subsequent NULL pointer dereference exists in the SampleAuxInfoReader constructor within libheif/sequences/track.cc. The vulnerability is triggered when a malformed HEIF file contains a specific combination of metadata: a zero entry count in the Sample to Chunk Box (stco) and Sample Auxiliary Information Offsets Box (saio), but a non-zero sample count in the Sample Auxiliary Information Sizes Box (saiz). This configuration causes the parser to enter a loop and attempt to access an empty 'chunks' vector at index 0. An attacker can exploit this by providing a crafted HEIF/AVIF file to any application using the libheif public API (e.g., heif_context_read_from_file). The issue is fixed in version 1.22.0.

Affected products

strukturag libheif <= 1.21.2

Timeline

2026-05-19: patched: Fixed in version 1.22.0
2026-05-22: disclosed: CVE-2026-41069 published

References

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