CVE-2026-31938: jsPDF is a library to generate PDFs in JavaScript

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CRITICAL 9.6UPGRADE

CVE-2026-31938 is a critical-severity flaw (CVSS 9.6) affecting jspdf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

jsPDF is a library to generate PDFs in JavaScript. Prior to version 4.2.1, user control of the `options` argument of the `output` function allows attackers to inject arbitrary HTML (such as scripts) into the browser context the created PDF is opened in. The vulnerability can be exploited in the following scenario: the attacker provides values for the output options, for example via a web interface. These values are then passed unsanitized (automa

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-18
Last modified	2026-08-18

Publisher (CNA): GitHub, Inc. · Vendor: parall

Last updated 2026-08-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-18 04:17 UTCPublished CVE record published
2026-08-18 12:18 UTCUpdated Record last modified

parall jspdf UPGRADE

Affected: < 4.2.1

Fixed in: 4.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls jspdf

2. UPGRADE to 4.2.1

npm install jspdf@">=4.2.1"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-31938?

jspdf: upgrade to 4.2.1. Exact commands for each OS are on this page.

Is CVE-2026-31938 being exploited?

CVE-2026-31938 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-31938 affect?

CVE-2026-31938 affects jspdf. Severity is critical (CVSS 9.6). jsPDF is a library to generate PDFs in JavaScript. Prior to version 4.2.1, user control of the `options` argument of the `output` function allows attackers to inject arbitrary HTML (such as scripts) into the browser context the created PDF

How urgent is CVE-2026-31938?

Priority 39/100. Critical severity

Related CVEs

CVE-2025-68428 HIGH 7.5 UPGRADE jsPDF is a library to generate PDFs in JavaScript
CVE-2026-31898 HIGH 8.1 UPGRADE jsPDF is a library to generate PDFs in JavaScript
CVE-2026-24737 HIGH 8.1 UPGRADE jsPDF is a library to generate PDFs in JavaScript
CVE-2026-24133 MEDIUM 6.5 UPGRADE jsPDF is a library to generate PDFs in JavaScript
CVE-2026-24043 MEDIUM 5.4 UPGRADE jsPDF is a library to generate PDFs in JavaScript

References

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