CVE-2023-36810
MEDIUM
MEDIUM
Priority: 0.04
BB Relevance:
63/100
Published: 2023-06-30
Modified: 2026-11-02
First seen: 2026-11-02
Status: active
Attack Surface
Network
Low Complexity
No Auth
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
Required
S:
Unchanged
C:
None
I:
None
A:
High
Description
pypdf is a pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. An attacker who uses this vulnerability can craft a PDF which leads to unexpected long runtime. This quadratic runtime blocks the current process and can utilize a single core of the CPU by 100%. It does not affect memory usage. This issue has been addressed in PR 808 and versions from 1.27.9 include this fix. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Weakness Classification (1)
References & Advisories (4)
Patch
Exploit
Patch
Vendor Advisory
Exploit
Issue Tracking
Vendor Advisory