What is CVE-2021-37819?

CVE-2021-37819 is a high-severity vulnerability in Pdftk-Java Project, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2022-09-09.

How severe is CVE-2021-37819?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Pdftk-Java Project

CVE-2021-37819

PDF Labs pdftk-java v3.2.3 was discovered to contain an infinite loop via the component /text/pdf/PdfReader.java.

Published 2022-09-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001

Affected products

Pdftk-Java Project — versions 3.2.3

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

gitlab.com/pdftk-java/pdftk/-/merge_requests/21/diffs (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-37819?: CVE-2021-37819 is a high-severity vulnerability in Pdftk-Java Project, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2022-09-09.
How severe is CVE-2021-37819?: High severity. CVSS v3 base score is 7.5 out of 10.