CVE-2026-113792CWE-835

CVE-2026-113792

published October 21, 2026

CVSS
6.0
EPSS
0%
Percentile
39.3
In the wild
Unconfirmed
What it is

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, calling PdfWriter.find_outline_item on a crafted PDF with a cyclic outline hierarchy can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.

The record
Technical detail
CVSS
6.0 · NONE
CVSS v4.0
6.0 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00466 · 39.3th percentile
Weakness
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
Published
2026-10-21T20:17Z
References (4)
https://github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0 · [email protected]https://github.com/py-pdf/pypdf/pull/4188 · [email protected]https://github.com/py-pdf/pypdf/releases/tag/6.20.1 · [email protected]https://github.com/py-pdf/pypdf/security/advisories/GHSA-qfv9-64jg-mh7p · [email protected]
EPSS history
Timeline
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 21 OCT 15:55Z
    pypdf: Possible infinite loop in PdfWriter.find_outline_item
    cvelistv5
  • 21 OCT 15:55Z
    pypdf: Possible infinite loop in PdfWriter.find_outline_item
    cvelistv5