CVE-2026-102996

high

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can provide a TrueType or Type1 simple font with an unusually large /Widths array, causing pypdf/_font.py Font._collect_tt_t1_character_widths to process entries beyond the 256 character codes meaningful for a simple font and consume excessive memory during operations such as text extraction. This issue is fixed in version 6.18.1.

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9cg-prrw-2r8q

https://github.com/py-pdf/pypdf/releases/tag/6.18.1

https://github.com/py-pdf/pypdf/pull/4072

https://github.com/py-pdf/pypdf/commit/0fb26eb8cdd01c44b3b2c9fe8329751be2f7cfd5

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-90368

Details

Source: Mitre, NVD

Published: 2026-09-30

Updated: 2026-10-01

Named Vulnerability: GHSA-g9cg-prrw-2r8q

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 8.7

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00524