Pillow is a Python imaging library. From 11.3.0 until 13.0.0, Pillow has a heap use-after-free when libtiff rejects a tag while encoding TIFF data to an in-memory buffer. When an application saves attacker-influenced TIFF tags to BytesIO, libtiff can reject a tag during encoding in ImagingLibTiffEncode; the error path then frees the output buffer without closing or clearing the TIFF handle, and later cleanup flushes through the write callback into freed memory, which can crash the process and may enable code execution. This issue is fixed in version 13.0.0.
Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Tue, 20 Oct 2026 00:30:00 +0000
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-825 | |
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threat_severity
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threat_severity
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Mon, 19 Oct 2026 23:00:00 +0000
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Python-pillow
Python-pillow pillow |
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Python-pillow
Python-pillow pillow |
Mon, 19 Oct 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | Pillow is a Python imaging library. From 11.3.0 until 13.0.0, Pillow has a heap use-after-free when libtiff rejects a tag while encoding TIFF data to an in-memory buffer. When an application saves attacker-influenced TIFF tags to BytesIO, libtiff can reject a tag during encoding in ImagingLibTiffEncode; the error path then frees the output buffer without closing or clearing the TIFF handle, and later cleanup flushes through the write callback into freed memory, which can crash the process and may enable code execution. This issue is fixed in version 13.0.0. | |
| Title | Pillow: Heap use-after-free when encoding TIFF to an in-memory buffer | |
| Weaknesses | CWE-416 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-10-19T21:02:15.197Z
Reserved: 2026-10-19T16:58:51.959Z
Link: CVE-2026-112396
No data.
Status : Received
Published: 2026-10-19T22:17:06.837
Modified: 2026-10-19T22:17:06.837
Link: CVE-2026-112396
OpenCVE Enrichment
Updated: 2026-10-20T01:15:06Z