CVE-2023-28428: PDFio vulnerable to Denial Of Service when opening a corrupt PDF file

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-03-20 · updated 2026-06-17
Weakness: CWE-770

Description

PDFio is a C library for reading and writing PDF files. In versions 1.1.0 and prior, a denial of service vulnerability exists in the pdfio parser. Crafted pdf files can cause the program to run at 100% utilization and never terminate. This is different from CVE-2023-24808. A patch for this issue is available in version 1.1.1.

Affected products

michaelrsweet pdfio: before 1.1.1 — fixed in 1.1.1

How to fix

Upgrade to a fixed version: michaelrsweet pdfio 1.1.1. Check the vendor advisory for mitigations.

References

https://github.com/michaelrsweet/pdfio/commit/97d4955666779dc5b0665e15dd951a5c12426a31
https://github.com/michaelrsweet/pdfio/security/advisories/GHSA-68x8-9phf-j7jf
https://github.com/michaelrsweet/pdfio/commit/97d4955666779dc5b0665e15dd951a5c12426a31
https://github.com/michaelrsweet/pdfio/security/advisories/GHSA-68x8-9phf-j7jf

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