CVE-2021-37819

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

7.5 HighFix available

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

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.85%Unchanged since Sep 10, 2022

What each source reports

NVD Score used 7.5

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

Record: CVE-2021-37819
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-835
Updated: 2026-11-02

CVE List No score

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

Record: CVE-2021-37819
Updated: 2026-11-02

EUVDEUVD-2021-24300 No score

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

Record: EUVD-2021-24300
Updated: 2026-11-03

GitHub AdvisoriesGHSA-gj7r-55x2-8vv5 7.5

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

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

Record: GHSA-gj7r-55x2-8vv5
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-835
Updated: 2026-11-02

OSV 7.5

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

Record: CVE-2021-37819
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2021-37819 7.5

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

Record: DEBIAN-CVE-2021-37819
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-37819 7.5

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

Record: UBUNTU-CVE-2021-37819
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

pdftk-java project pdftk-java

Affected packages

Affected packages
Package	Affected	Fixed
`libitext-java` Debian:12	All versions, plus listed versions 2.1.7-142.1.7-152.1.7-16	None known
`libitext-java` Debian:13	before 2.1.7-16	2.1.7-16
`libitext-java` Debian:14	before 2.1.7-16	2.1.7-16
`libitext1-java` Debian:12	All versions, plus listed versions 1.4-7	None known
`libitext5-java` Debian:12	All versions, plus listed versions 5.5.13.3-25.5.13.3-35.5.13.3-45.5.13.4-15.5.13.4-25.5.13.4-3	None known
`libitext5-java` Debian:13	before 5.5.13.3-4	5.5.13.3-4
`libitext5-java` Debian:14	before 5.5.13.3-4	5.5.13.3-4
`pdftk` Debian:12	before 2.02-5	2.02-5
`pdftk-java` Debian:12	before 3.3.2-1	3.3.2-1
`pdftk-java` Debian:13	before 3.3.2-1	3.3.2-1

Show 19 moreShow less

Affected packages
Package	Affected	Fixed
`pdftk-java` Debian:14	before 3.3.2-1	3.3.2-1
`libitext-java` Ubuntu:16.04:LTS	All versions, plus listed versions 2.1.7-92.1.7-10	None known
`libitext5-java` Ubuntu:16.04:LTS	All versions, plus listed versions 5.5.6-15.5.6-2	None known
`libitext-java` Ubuntu:18.04:LTS	All versions, plus listed versions 2.1.7-112.1.7-12	None known
`libitext5-java` Ubuntu:18.04:LTS	All versions, plus listed versions 5.5.6-25.5.6-4	None known
`libitext-java` Ubuntu:20.04:LTS	All versions, plus listed versions 2.1.7-12	None known
`libitext5-java` Ubuntu:20.04:LTS	All versions, plus listed versions 5.5.13.1-1build2	None known
`pdftk-java` Ubuntu:20.04:LTS	All versions, plus listed versions 3.0.2-23.0.6-13.0.9-1	None known
`libitext-java` Ubuntu:22.04:LTS	All versions, plus listed versions 2.1.7-12	None known
`libitext5-java` Ubuntu:22.04:LTS	All versions, plus listed versions 5.5.13.2-1	None known
`pdftk-java` Ubuntu:22.04:LTS	All versions, plus listed versions 3.2.2-1	None known
`libitext-java` Ubuntu:24.04:LTS	All versions, plus listed versions 2.1.7-142.1.7-152.1.7-16	None known
`libitext5-java` Ubuntu:24.04:LTS	All versions, plus listed versions 5.5.13.3-25.5.13.3-35.5.13.3-4	None known
`libitext-java` Ubuntu:25.10	All versions, plus listed versions 2.1.7-16	None known
`libitext5-java` Ubuntu:25.10	All versions, plus listed versions 5.5.13.3-4	None known
`libitext-java` Ubuntu:26.10	All versions, plus listed versions 2.1.7-16	None known
`libitext5-java` Ubuntu:26.10	All versions, plus listed versions 5.5.13.4-2	None known
`libitext-java` Ubuntu:26.04:LTS	All versions, plus listed versions 2.1.7-16	None known
`libitext5-java` Ubuntu:26.04:LTS	All versions, plus listed versions 5.5.13.3-45.5.13.4-15.5.13.4-2	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-37819 is a high vulnerability (CVSS 7.5) in Pdftk-java Project Pdftk-java, published September 9, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.85%, the 58th percentile. Fixed in libitext-java 2.1.7-16.

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

In short

References