CVE-2026-62377

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Source
https://cve.org/CVERecord?id=CVE-2026-62377
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62377.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-62377
Aliases
  • GHSA-9ww4-9v47-m7pj
Downstream
Related
Published
2026-08-18T21:22:29Z
Modified
2026-09-11T08:36:38Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L CVSS Calculator
Summary
libheif: Reachable assertion in HeifContext::get_track() aborts on a valid-but-empty HEIF sequence file (context.cc:2110)
Details

libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted HEIF sequence accepted by heif_context_read_from_memory() can leave the context with no registered sequence tracks and crash when heif_context_get_track(ctx, 0) is called. HeifContext::get_track() in libheif/context.cc executes assert(has_sequence()) before its normal error handling, so assert-enabled builds abort instead of allowing the public wrapper in libheif/api/libheif/heif_sequences.cc to return null. In release builds, removing the assertion lets the track_id zero path dereference m_tracks.begin()->second on an empty map, which is undefined behavior and typically crashes. The issue is reachable through documented public APIs after parsing attacker-controlled bytes. This issue is fixed in version 1.23.1.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-617",
        "CWE-908"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62377.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
e1a0bc1c1ae74f8075eaca30a1cdb2b9bee698d3
Fixed
2c4bbb54c2738d4a5efbbe3e5fa1d5d76bb88eb0
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.23.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

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
v1.22.0
v1.22.1
v1.22.2
v1.23.0
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-2026-62377.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "150555058883365058183043304044301588756",
            "length": 399
        },
        "id": "CVE-2026-62377-050becf8",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/strukturag/libheif/commit/e1a0bc1c1ae74f8075eaca30a1cdb2b9bee698d3",
        "target": {
            "file": "libheif/context.cc",
            "function": "HeifContext::get_track"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "108813868142023599475746467801203463627",
                "203894374359211974211757315737720766435",
                "69849756915221979707388368752592625591",
                "260163628728503739087423909437750276342"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-62377-b4110261",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/strukturag/libheif/commit/e1a0bc1c1ae74f8075eaca30a1cdb2b9bee698d3",
        "target": {
            "file": "libheif/context.cc"
        }
    }
]
vanir_signatures_modified 
"2026-09-11T08:36:38Z"