CVE-2026-47251

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Source
https://cve.org/CVERecord?id=CVE-2026-47251
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47251.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-47251
Aliases
  • GHSA-p6q9-fhf2-vj9v
Downstream
Related
Published
2026-07-21T21:18:56Z
Modified
2026-08-12T16:09:40Z
Severity
  • 6.8 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
libheif has an incomplete fix for CVE-2026-3949: integer overflow bypass in vvdec_push_data2
Details

libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit b97c8b5, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge case where size is near UINT32_MAX. Version 1.22.0 patches the issue.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125",
        "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47251.json"
}
References

Affected packages

Git / github.com/strukturag/libheif

Affected ranges

Type
GIT
Repo
https://github.com/strukturag/libheif
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0c81a846b7401dbdb7118afd0761057f21e43511
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.22.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

v1.*
v1.1.0
v1.10.0
v1.11.0
v1.12.0
v1.13.0
v1.14.0
v1.14.1
v1.14.2
v1.15.0
v1.15.1
v1.15.2
v1.16.0
v1.16.1
v1.16.2
v1.17.0
v1.17.1
v1.17.2
v1.17.3
v1.17.4
v1.17.5
v1.17.6
v1.18.0
v1.18.0-rc1
v1.19.0
v1.19.1
v1.19.2
v1.19.3
v1.19.4
v1.19.5
v1.2.0
v1.20.0
v1.20.1
v1.21.0
v1.21.1
v1.21.2
v1.3.0
v1.3.1
v1.3.2
v1.7.0
v1.8.0
v1.9.0
v1.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47251.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "175107675317900759648359576881034358256",
                "220432159010798240840908416937024023837",
                "268268967745545109707798594937166387611",
                "253707932335489477155115861206639265538",
                "199679408075604976163979654915891773303",
                "175107675317900759648359576881034358256",
                "220432159010798240840908416937024023837",
                "268268967745545109707798594937166387611",
                "286778284410146987248233194002847271266",
                "178248309108630471590778685235254536836"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-47251-91619f1d",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/strukturag/libheif/commit/0c81a846b7401dbdb7118afd0761057f21e43511",
        "target": {
            "file": "tests/uncompressed_box.cc"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T16:09:40Z"