CVE-2026-31826

EUVD-2026-10924
pypdf is a free and open-source pure-python PDF library. Prior to 6.8.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing a content stream with a rather large /Length value, regardless of the actual data length inside the stream. This vulnerability is fixed in 6.8.0.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 6%
Affected Products (NVD)
VendorProductVersion
pypdf_projectpypdf
𝑥
< 6.8.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
pypdf
bookworm
no-dsa
forky
6.9.2-2
fixed
sid
6.9.2-2
fixed
trixie
no-dsa
pypdf2
bookworm
no-dsa
bullseye
postponed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
pypdf
jammy
dne
noble
needs-triage
questing
ignored
resolute
needs-triage
Common Weakness Enumeration
References
https://github.com/py-pdf/pypdf/pull/3675
https://github.com/py-pdf/pypdf/releases/tag/6.8.0
https://github.com/py-pdf/pypdf/security/advisories/GHSA-hqmh-ppp3-xvm7