CVE-2026-96643

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Source
https://cve.org/CVERecord?id=CVE-2026-96643
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-96643.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-96643
Aliases
Downstream
CGA (27)
DEBIAN (1)
UBUNTU (1)
Published
2026-10-21T20:56:26Z
Modified
2026-10-22T11:21:13Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Pillow: PNG eXIf chunk makes EXIF parsing run in quadratic time
Details

Pillow is a Python imaging library. From 11.0.0 until 13.0.0, Exif.load() in src/PIL/Image.py repeatedly slices the remaining EXIF data while it begins with the six-byte Exif header. src/PIL/PngImagePlugin.py accepts an uncapped PNG eXIf chunk, so a file filled with repeated headers causes a new shrinking copy on every iteration and quadratic CPU work. The condition is reachable through Image.getexif(), Image._getexif(), and ImageOps.exif_transpose(), including common photo-upload rotation workflows. This issue is fixed in version 13.0.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96643.json"
}
References

Affected packages

Git / github.com/python-pillow/pillow

Affected ranges

Type
GIT
Repo
https://github.com/python-pillow/pillow
Events
Introduced
204aae6682fc936f5350b3fe70335776f81480a7
Fixed
293218ad059d994baf1777d882911bed6a49704a
Fixed
806e38381c781f32bbd22f4cd026678acd40fd6c
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "11.0.0"
                },
                {
                    "fixed": "13.0.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "806e38381c781f32bbd22f4cd026678acd40fd6c"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "13.0.0",
            "range": [
                {
                    "fixed": "293218ad059d994baf1777d882911bed6a49704a"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

11.*
11.0.0
11.1.0
11.2.1
11.3.0
12.*
12.0.0
12.1.0
12.2.0
12.3.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-96643.json"