CVE-2026-112393

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Source
https://cve.org/CVERecord?id=CVE-2026-112393
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112393.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-112393
Aliases
Downstream
Published
2026-10-19T20:46:40Z
Modified
2026-10-21T02:55:51Z
Severity
  • 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO
Details

Pillow is a Python imaging library. From 2.0.0 until 13.0.0, Pillow has a heap buffer overflow and stale-heap disclosure in _tiffWriteProc when saving compressed TIFF data through libtiff to a target without a usable fileno(), such as BytesIO. The callback sizes its allocation from the prior buffer size instead of the current write position, allowing an attacker-controlled out-of-line TIFF tag or retained ICC profile to be copied beyond the allocation after libtiff seeks forward. This overflow can crash the process and may allow code execution. Independently, unwritten alignment gaps in compressed TIFF output larger than 64 KiB can disclose stale heap bytes without a crafted tag. File paths and targets with real file descriptors are unaffected. This issue is fixed in version 13.0.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-122"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112393.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "introduced":  "2.0.0"
                        },
                        {
                            "fixed":  "13.0.0"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StringRangeExpression"
                }
            ]
        },
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "fixed":  "13.0.0"
                        }
                    ],
                    "source":  "DESCRIPTION"
                }
            ]
        }
    ]
}
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
11582e5ffbdceb973d5ee593f3105af5a9852b40
Fixed
293218ad059d994baf1777d882911bed6a49704a
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "fixed":  "11582e5ffbdceb973d5ee593f3105af5a9852b40"
                }
            ],
            "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-2026-112393.json"