CVE-2026-27628
HIGHCVSS 7.5/10EPSS 0.35%
Last modified
CVE-2026-27628 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. EPSS estimates a 0.35% chance of exploitation in the next 30 days.
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. This has been fixed in pypdf 6.7.2. As a workaround, one may apply the patch manually.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Pypdf Project | Pypdf | < 6.7.2 |
References
- https://github.com/py-pdf/pypdf/issues/3654Issue Tracking, Patch
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-2rw7-x74f-jg35Patch, Vendor Advisory
- https://github.com/py-pdf/pypdf/issues/3654Issue Tracking, Patch
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-27628?
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. This has been fixed in pypdf 6.7.2. As a workaround, one may apply the patch manually.
How severe is CVE-2026-27628?
CVE-2026-27628 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.
How do I fix CVE-2026-27628?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-27622OpenEXR provides the specification and reference implementat…7.8
- CVE-2026-27623Valkey is a distributed key-value database. Starting in vers…7.5
- CVE-2026-27624Coturn is a free open source implementation of TURN and STUN…6.5
- CVE-2026-27625Stirling-PDF is a locally hosted web application that perfor…6.5
- CVE-2026-27626OliveTin gives access to predefined shell commands from a we…9.9
- CVE-2026-27627Karakeep is a elf-hostable bookmark-everything app. In versi…6.1
- CVE-2026-27629InvenTree is an Open Source Inventory Management System. Pri…8.8
- CVE-2026-2763Use-after-free in the JavaScript Engine component. This vuln…9.8
- CVE-2026-27630TinyWeb is a web server (HTTP, HTTPS) written in Delphi for …7.5
- CVE-2026-27631Exiv2 is a C++ library and a command-line utility to read, w…5.3
- CVE-2026-27632Talishar is a fan-made Flesh and Blood project. Prior to com…3.1
- CVE-2026-27633TinyWeb is a web server (HTTP, HTTPS) written in Delphi for …7.5
Are you affected by CVE-2026-27628?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST