CVE-2026-28231

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Source
https://cve.org/CVERecord?id=CVE-2026-28231
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28231.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-28231
Aliases
Downstream
Related
Published
2026-02-27T20:13:45.195Z
Modified
2026-07-15T19:00:07.880237Z
Severity
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
pillow_heif Has Integer Overflow in Encode Path Buffer Validation that Leads to Heap Out-of-Bounds Read
Details

pillow_heif is a Python library for working with HEIF images and plugin for Pillow. Prior to version 1.3.0, an integer overflow in the encode path buffer validation of _pillow_heif.c allows an attacker to bypass bounds checks by providing large image dimensions, resulting in a heap out-of-bounds read. This can lead to information disclosure (server heap memory leaking into encoded images) or denial of service (process crash). No special configuration is required — this triggers under default settings. Version 1.3.0 fixes the issue.

Database specific 
{
    "cwe_ids": [
        "CWE-125",
        "CWE-190"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28231.json"
}
References

Affected packages

Git / github.com/bigcat88/pillow_heif

Affected ranges

Type
GIT
Repo
https://github.com/bigcat88/pillow_heif
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
6bffca6bada2e071418a9092e7958bcecf4652c1
Fixed
8305a15d3780c533b762578cbe987d27a2c59c7a
Database specific 
{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:bigcat88:pillow-heif:*:*:*:*:*:python:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.3.0"
        }
    ]
}

Affected versions

v0.*
v0.1.1
v0.1.10
v0.1.11
v0.1.2
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.1.9
v0.10.0
v0.10.1
v0.11.0
v0.11.1
v0.12.0
v0.13.0
v0.13.1
v0.14.0
v0.15.0
v0.16.0
v0.17.0
v0.18.0
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.20.0
v0.21.0
v0.22.0
v0.3.0
v0.3.1
v0.3.2
v0.4.0
v0.5.0
v0.5.1
v0.6.0
v0.6.1
v0.7.0
v0.7.1
v0.7.2
v0.8.0
v0.9.0
v0.9.1
v0.9.2
v0.9.3
v1.*
v1.0.0
v1.1.0
v1.1.1
v1.2.0
v1.2.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28231.json"
vanir_signatures 
[
    {
        "source": "https://github.com/bigcat88/pillow_heif/commit/8305a15d3780c533b762578cbe987d27a2c59c7a",
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "function_hash": "229049611692815523836991351280953004002",
            "length": 1653.0
        },
        "id": "CVE-2026-28231-7e61bac2",
        "target": {
            "function": "_CtxWriteImage_add_plane_l",
            "file": "pillow_heif/_pillow_heif.c"
        },
        "deprecated": false
    },
    {
        "source": "https://github.com/bigcat88/pillow_heif/commit/8305a15d3780c533b762578cbe987d27a2c59c7a",
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "246079929936737268733229901171032701314",
                "110371096488593823279586643170395125212",
                "234987017400952139396110290102137327023",
                "15033829013945911038025639667639462153",
                "246079929936737268733229901171032701314",
                "110371096488593823279586643170395125212",
                "234987017400952139396110290102137327023",
                "15033829013945911038025639667639462153",
                "246079929936737268733229901171032701314",
                "110371096488593823279586643170395125212",
                "234987017400952139396110290102137327023",
                "15033829013945911038025639667639462153"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-28231-88d3275d",
        "target": {
            "file": "pillow_heif/_pillow_heif.c"
        },
        "deprecated": false
    },
    {
        "source": "https://github.com/bigcat88/pillow_heif/commit/8305a15d3780c533b762578cbe987d27a2c59c7a",
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "function_hash": "291382291529431139650997524064320700110",
            "length": 2457.0
        },
        "id": "CVE-2026-28231-922777ee",
        "target": {
            "function": "_CtxWriteImage_add_plane_la",
            "file": "pillow_heif/_pillow_heif.c"
        },
        "deprecated": false
    },
    {
        "source": "https://github.com/bigcat88/pillow_heif/commit/8305a15d3780c533b762578cbe987d27a2c59c7a",
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "function_hash": "4004059895367826926163106730994271899",
            "length": 5640.0
        },
        "id": "CVE-2026-28231-93ddbcc7",
        "target": {
            "function": "_CtxWriteImage_add_plane",
            "file": "pillow_heif/_pillow_heif.c"
        },
        "deprecated": false
    }
]
vanir_signatures_modified 
"2026-07-15T19:00:07Z"