pypdf is a free and open-source pure-python PDF library. Prior to 6.21.1, an attacker can craft a PDF containing image data labeled with the /DCTDecode filter that causes Pillow to select and invoke an unintended image parser when the image is loaded. Environments without the optional Pillow dependency are not affected. This issue is fixed in version 6.21.1.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 8
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-27 22:18
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-27 23:16
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-27 22:18
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 16:46
- StatusReceived → PublishedNVD modified 2026-10-21 14:38
- StatusPublished → ReceivedNVD modified 2026-10-21 15:17
- CVSS2.3 (v4.0, CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N) → 2.3 (v4.0, CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)NVD modified 2026-10-21 15:17
- First seenCVSS 2.3 · py-pdfNVD modified 2026-10-21 14:38
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.