What is CVE-2023-28428?

CVE-2023-28428 is a medium-severity vulnerability in Michaelrsweet Pdfio, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.2/10. Published 2023-03-20.

How severe is CVE-2023-28428?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Resource exhaustion in Michaelrsweet Pdfio

CVE-2023-28428

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.

Published 2023-03-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (11.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Michaelrsweet Pdfio — versions <= 1.1.0
Pdfio Project

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

github.com/michaelrsweet/pdfio/security/advisories/GHSA-68x8-9phf-j7jf (Vendor Advisory)
github.com/michaelrsweet/pdfio/commit/97d4955666779dc5b0665e15dd951a5c12426a31 (Patch)

Frequently asked questions

What is CVE-2023-28428?: CVE-2023-28428 is a medium-severity vulnerability in Michaelrsweet Pdfio, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.2/10. Published 2023-03-20.
How severe is CVE-2023-28428?: Medium severity. CVSS v3 base score is 6.2 out of 10.