CVE-2026-59197

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Source
https://cve.org/CVERecord?id=CVE-2026-59197
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-59197.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-59197
Aliases
Downstream
CGA (31)
CLSA (4)
DEBIAN (1)
ECHO (1)
MGASA (1)
MINI (11)
OESA (5)
openSUSE (1)
RHSA (7)
RLSA (1)
ROOT (1)
SUSE (4)
UBUNTU (1)
Related
ALSA (1)
openSUSE (1)
SUSE (4)
Published
2026-07-14T16:25:23Z
Modified
2026-08-27T18:26:54Z
Severity
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H CVSS Calculator
Summary
Pillow: Heap out-of-bounds write in Pillow `ImageFilter.RankFilter` via integer overflow in `ImagingExpand`
Details

Pillow is a Python imaging library. Prior to 12.3.0, Pillow's public rank-filter API can trigger a native heap out-of-bounds write when given a very large odd filter size because ImageFilter.RankFilter.filter() calls image.expand(size // 2, size // 2) before rank-filter size validation and ImagingExpand() computes output dimensions with unchecked signed int arithmetic. This issue is fixed in version 12.3.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-190",
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59197.json"
}
References

Affected packages

Git / github.com/python-pillow/pillow

Affected ranges

Type
GIT
Repo
https://github.com/python-pillow/pillow
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
bb1d8e8ab8d29048624d96e3ee53cecf7c13d13d
Fixed
cce3bdb867c77a3420261ed1bfdb6b0787ec8fc1
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "12.3.0"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

1.*
1.0
1.2
1.7.7
1.7.8
10.*
10.0.0
10.1.0
10.2.0
10.3.0
10.4.0
11.*
11.0.0
11.1.0
11.2.1
11.3.0
12.*
12.0.0
12.1.0
12.2.0
2.*
2.0.0
2.1.0
2.2.0
2.2.1
2.3.0
2.5.0
2.7.0
2.8.0
2.8.1
2.9.0
2.9.0.dev0
2.9.0.dev1
2.9.0.dev2
3.*
3.1.0
3.1.0-rc1
3.2.0
3.3.0
3.4.0
4.*
4.0.0
4.0.0a
4.1.0
4.2.0
4.3.0
5.*
5.0.0
5.1.0
5.2.0
5.3.0
5.4.0
6.*
6.0.0
6.1.0
6.2.0
7.*
7.0.0
7.1.0
7.2.0
8.*
8.0.0
8.1.0
8.2.0
8.3.0
8.4.0
9.*
9.0.0
9.1.0
9.2.0
9.3.0
9.4.0
9.5.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-59197.json"