Description
Pillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow takes quadratic time to reserve PDF object identifiers when saving many frames with save_all enabled. PdfParser.next_object_id() repeatedly rebuilds and scans all previously reserved identifiers for every object. An attacker can supply a multi-frame image, including a small APNG with a large declared frame count, to an application that converts it to a multipage PDF. This can consume excessive CPU and deny service. This issue is fixed in version 13.0.0.
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Remediation
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Tracking
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Advisories
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References
History
Mon, 19 Oct 2026 22:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Pillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow takes quadratic time to reserve PDF object identifiers when saving many frames with save_all enabled. PdfParser.next_object_id() repeatedly rebuilds and scans all previously reserved identifiers for every object. An attacker can supply a multi-frame image, including a small APNG with a large declared frame count, to an application that converts it to a multipage PDF. This can consume excessive CPU and deny service. This issue is fixed in version 13.0.0. | |
| Title | Pillow: Quadratic-time DoS in PDF save_all (PdfParser.next_object_id) | |
| Weaknesses | CWE-407 | |
| References |
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| Metrics |
cvssV4_0
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Subscriptions
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-10-19T21:55:19.424Z
Reserved: 2026-10-19T20:16:09.856Z
Link: CVE-2026-112894
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Status : Received
Published: 2026-10-19T22:17:09.483
Modified: 2026-10-19T22:17:09.483
Link: CVE-2026-112894
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OpenCVE Enrichment
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Weaknesses
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CWE-407
Inefficient Algorithmic Complexity