CVE-2026-102994CWE-400CWE-407denial-of-service

CVE-2026-102994

High · published October 1, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
26.8
In the wild
Unconfirmed
What it is

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.0, a crafted PDF containing indirect-object identifiers or generation-number tokens that continue for a long time without whitespace can cause pypdf/_reader.py and pypdf/generic/_base.py to scan excessive input through read_until_whitespace, resulting in long runtimes and application unavailability. This issue is fixed in version 6.18.0.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · 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
EPSS
0.00345 · 26.8th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-407 · Inefficient Algorithmic Complexity
Published
2026-10-01T00:17Z
Affected products (1)
ProductVersionsFixed in
pypdf_project/pypdf< 6.18.06.18.0
References (4)
https://github.com/py-pdf/pypdf/commit/82501d2993c6387833c4949d205caeb188f8bb9e · [email protected]https://github.com/py-pdf/pypdf/pull/4055 · [email protected]https://github.com/py-pdf/pypdf/releases/tag/6.18.0 · [email protected]https://github.com/py-pdf/pypdf/security/advisories/GHSA-5jq2-8x83-x246 · [email protected]
EPSS history
Timeline
  • 02 OCT 03:41Z
    EPSS moved — → 1%
    epss
  • 30 SEP 19:57Z
    pypdf: Possible long runtimes/large memory usage when parsing indirect objects
    cvelistv5