CVE-2026-113793CWE-835

CVE-2026-113793

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, removing an object from a crafted cyclic PDF tree, such as an outline item, 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-9mx8-4j7g-633p · [email protected]
EPSS history
Timeline
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 21 OCT 15:57Z
    pypdf: Possible infinite loop when removing tree items
    cvelistv5
  • 21 OCT 15:57Z
    pypdf: Possible infinite loop when removing tree items
    cvelistv5