CVE-2026-112398

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Source
https://cve.org/CVERecord?id=CVE-2026-112398
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112398.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-112398
Aliases
  • GHSA-5x8w-8jj5-q52h
Downstream
Published
2026-10-19T21:07:25Z
Modified
2026-10-23T07:03:08Z
Severity
  • 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Pillow: Heap buffer overflow in FlashPix (FPX) JPEG decoding leads to code execution
Details

Pillow is a Python imaging library. Prior to 13.0.0, Pillow's FlashPix JPEG-tile decoder can write decoded scanlines beyond the allocated tile buffer. FlashPix (FPX) JPEG decoding selects raw mode LA with two bytes per pixel, while an unrecognized JPEG mode can be decoded as JCS_UNKNOWN with four components, causing ImagingJpegDecode to write four-component scanlines into the two-byte tile buffer. An attacker can supply a crafted OLE2 FlashPix file to an application with the optional olefile dependency installed that opens or thumbnails untrusted input. This can corrupt heap memory and may allow arbitrary code execution. This issue is fixed in version 13.0.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-122",
        "CWE-787"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112398.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
293218ad059d994baf1777d882911bed6a49704a
Fixed
242a059aedc1935097d9aa1dc3f099750467ba75
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "13.0.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "242a059aedc1935097d9aa1dc3f099750467ba75"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "13.0.0",
            "range":  [
                {
                    "fixed":  "293218ad059d994baf1777d882911bed6a49704a"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

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
12.3.0
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/cve-osv-conversion/osv-output/CVE-2026-112398.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "174672382090074285765178868364185036449",
            "length":  3146
        },
        "id":  "CVE-2026-112398-23b030c6",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/python-pillow/pillow/commit/242a059aedc1935097d9aa1dc3f099750467ba75",
        "target":  {
            "file":  "src/libImaging/JpegDecode.c",
            "function":  "ImagingJpegDecode"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "241043789764821415875146612677275012071",
                "213594770400001693933981602434679768241",
                "202014699571398194546668346273410007608"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-112398-9e133905",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/python-pillow/pillow/commit/242a059aedc1935097d9aa1dc3f099750467ba75",
        "target":  {
            "file":  "src/libImaging/JpegDecode.c"
        }
    }
]
vanir_signatures_modified 
"2026-10-23T07:03:08Z"