CVE-2026-102999

HIGH

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/_doc_common.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when an application accesses the embedded-file mapping. This issue is fixed in version 6.19.0.

CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Published: 9/30/2026Modified: 10/5/2026

Related Intelligence (1)

HIGHVulnerability

NVD HIGH: CVE-2026-102999 — pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a craf...

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/_doc_common.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when an application accesses the embedded-file mapping. This issue is fixed in version 6.19.0.

CVE-2026-102999
NIST NVD

References (4)

https://github.com/py-pdf/pypdf/commit/6b10556d13609a68f9ed18bb29fdd8bba88eb2c3Patchhttps://github.com/py-pdf/pypdf/pull/4081PatchIssue Trackinghttps://github.com/py-pdf/pypdf/releases/tag/6.19.0Release Noteshttps://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcjVendor Advisory