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CVE-2026-96637

7.1 high SSVC exploitation: none Analyzed
NVD · CVE.org

Pillow is a Python imaging library. Prior to 13.0.0, SpiderImageFile.seek() in src/PIL/SpiderImagePlugin.py reparses a later SPIDER stack frame and replaces self._size without rerunning Image._decompression_bomb_check(). A tiny file can use a safe first frame to pass Image.open() and then declare very large dimensions in a later mode F frame. Loading that frame allocates approximately four bytes per attacker-declared pixel and can consume multiple gigabytes of memory. This issue is fixed in version 13.0.0.

Fix

Patch, vendor advisory and mitigation references on NVD 2

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 7

  1. Cpes+1 CPE criteria (now 1)NVD modified 2026-10-27 14:24
  2. StatusPublished → AnalyzedNVD modified 2026-10-27 14:24
  3. StatusUndergoing Analysis → PublishedNVD modified 2026-10-23 21:18
  4. StatusAwaiting Analysis → Undergoing AnalysisNVD modified 2026-10-23 22:17
  5. StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 16:46
  6. StatusReceived → PublishedNVD modified 2026-10-21 21:01
  7. First seenCVSS 7.1NVD modified 2026-10-21 21:20

Affected (CPE criteria) 1

  • cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*

References 4