CVE-2026-32882

CVE Enrichment

CVSS: 7.1 HIGH
EPSS: 0.71%
EPSS Percentile: 52.51%
CISA KEV: Not listed

Description

libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap buffer over-read in HeifPixelImage::overlay() in libheif/pixelimage.cc. When compositing an overlay image (iovl) whose child image has a different bit depth for the alpha channel than for the color channels, the function indexes into the alpha plane using the color channel stride (in_stride) instead of the previously retrieved alpha_stride, causing reads past the end of the alpha buffer (up to 3,123 bytes for a 100×50 image with 10-bit color and 8-bit alpha). A crafted HEIF file can exploit this to cause a denial of service (crash) or potentially disclose adjacent heap memory through leaked bytes embedded in the decoded output pixels. This issue has been fixed in versionThis issue has been fixed in version 1.22.0.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: security-advisories@github.com
Published: 20-May-2026 04:16
Last Modified: 24-Jul-2026 16:10
EPSS Date: 2026-10-16
CWE: CWE-125

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:R /
                            S:U /
                            C:L /
                            I:N /
                            A:H

References

Last enrichment sync: 17-Oct-2026 19:49
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

#OpenAI Researchers Used Claude Opus 5 to Chain Flaws and Access OpenAI Staff Accounts

MITRE ATT&CK (3)

Vendors (2)

Products (9)

Tools (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.