CVE-2026-113794CWE-835

CVE-2026-113794

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 6.20.0, an attacker can craft an incomplete PDF that ends inside a standard cross-reference table, causing pypdf to mishandle the unexpected end of file and enter an infinite loop. This issue is fixed in version 6.20.0.

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 (5)
https://github.com/py-pdf/pypdf/commit/37e1cd681744bac38b159f7e1c614eee8d639c58 · [email protected]https://github.com/py-pdf/pypdf/issues/4169 · [email protected]https://github.com/py-pdf/pypdf/pull/4170 · [email protected]https://github.com/py-pdf/pypdf/releases/tag/6.20.0 · [email protected]https://github.com/py-pdf/pypdf/security/advisories/GHSA-39mj-jf6j-2qj3 · [email protected]
EPSS history
Timeline
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 21 OCT 15:59Z
    pypdf: Possible infinite loop when hitting EOF in standard xref table
    cvelistv5
  • 21 OCT 15:59Z
    pypdf: Possible infinite loop when hitting EOF in standard xref table
    cvelistv5