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Vulnerabilities ›

CVE-2026-33699

High

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file

CWE-835 — Weakness Type

                    Published: Mar 27, 2026                      ·  Modified: Apr 2, 2026                      ·  Source: NVD                

CVSS v3

7.5

🔗 NVD Official

📄 Description (English)

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.

🤖

Queued for AI Analysis

This CVE will be auto-analyzed on the next cron run.

🔗 References & Sources 3

https://github.com/py-pdf/pypdf/pull/3693

security-advisories@github.com

Issue Tracking Patch

https://github.com/py-pdf/pypdf/releases/tag/6.9.2

security-advisories@github.com

Product Release Notes

https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3

security-advisories@github.com

Patch Vendor Advisory

📦 Affected Products / CPE 1 entries

pypdf_project:pypdf

📊 CVSS Score

7.5

/ 10.0 — High

📊 CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorN — None / Network

Attack ComplexityL — Low / Local

Privileges RequiredN — None / Network

User InteractionN — None / Network

ScopeU — Unchanged

ConfidentialityN — None / Network

IntegrityN — None / Network

AvailabilityH — High

📋 Quick Facts

Severity High

CVSS Score7.5

CWECWE-835

EPSS0.05%

Exploit No

Patch ✓ Yes

Published 2026-03-27

Source Feed nvd

🏷️ Tags

patch-available CWE-835

🏢 Vendor Advisories

🔗 https://github.com/py-pdf/pypdf/security/advisories/...

⚡ Actions

🔗 NVD Official Page ⚡ Exploit-DB Search 🐙 GitHub PoC Search 🎯 MITRE ATT&CK 📊 CVE Details

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