How severe is CVE-2026-41069?

CVE-2026-41069 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-41069 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-41069?

CVE-2026-41069 affects Struktur Libheif. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-41069?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-41069 have an EU (EUVD) identifier?

Yes. CVE-2026-41069 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31503.

When was CVE-2026-41069 published?

CVE-2026-41069 was published on 2026-05-22 and last updated on 2026-06-17.

CVE-2026-41069

CVE-2026-41069 is a medium-severity vulnerability in Struktur Libheif with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-31503
Weakness: CWE-125
Affected product: Struktur Libheif
Published: 2026-05-22
Last modified: 2026-06-17

Description

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a malformed HEIF sequence file can trigger an out-of-bounds read in core sequence parsing logic, causing DoS. A malformed file can have stco.entry_count == 0 (creating no chunks) while still passing validation because saio.entry_count == 0 matches, but with saiz.sample_count > 0 the SampleAuxInfoReader constructor still enters its loop. This leads to an out-of-bounds dereference on the empty chunks[0] in chunked mode.

Frequently asked questions

What is CVE-2026-41069?: libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a malformed HEIF sequence file can trigger an out-of-bounds read in core sequence parsing logic, causing DoS. A malformed file can have stco.entry_count == 0 (creating no chunks) while still passing validation because saio.entry_count == 0 matches, but with saiz.sample_count > 0 the SampleAuxInfoReader constructor still enters its loop. This leads to an out-of-bounds dereference on the empty chunks[0] in chunked mode.
How severe is CVE-2026-41069?: CVE-2026-41069 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-41069 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-41069?: CVE-2026-41069 affects Struktur Libheif. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-41069?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41069 have an EU (EUVD) identifier?: Yes. CVE-2026-41069 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31503.
When was CVE-2026-41069 published?: CVE-2026-41069 was published on 2026-05-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*

More vulnerabilities in Struktur Libheif

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CVE-2023-49462 — High (CVSS 8.8): libheif v1.17.5 was discovered to contain a segmentation violation via the component /libheif/exif.cc.
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