pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF that causes large memory usage or long runtimes when an application retrieves the document's form fields. This issue is fixed in version 6.21.0.
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 6
- StatusUndergoing Analysis → PublishedNVD modified 2026-10-28 16:42
- StatusPublished → Undergoing AnalysisNVD modified 2026-10-28 17:17
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-28 16:42
- StatusPublished → Awaiting AnalysisNVD modified 2026-10-22 16:46
- StatusReceived → PublishedNVD modified 2026-10-21 15:33
- First seenCVSS 6.0NVD modified 2026-10-21 16:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.