CVE-2026-48156

EUVD-2026-32913
pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with /W [0 0 0] values and large /Size values. This vulnerability is fixed in 6.12.0.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3.3 LOW
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 2.37%
Affected Products (NVD)
VendorProductVersion
pypdf_projectpypdf
𝑥
< 6.12.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
pypdf
bookworm
no-dsa
forky
vulnerable
sid
vulnerable
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
pypdf2
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
dne
resolute
dne
xenial
needs-triage
Common Weakness Enumeration
References
https://github.com/py-pdf/pypdf/pull/3791
https://github.com/py-pdf/pypdf/releases/tag/6.12.0
https://github.com/py-pdf/pypdf/security/advisories/GHSA-248m-82v9-q6g6