Improper Encoding or Escaping of Output in jspdf - CVE-2026-31898
Published: April 27, 2026
Vulnerability identifier: #VU127971
CSH Severity: High
CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-31898
CWE-ID: CWE-116
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to inject arbitrary PDF objects.
The vulnerability exists due to improper encoding or escaping of output in the createAnnotation method when processing the color parameter of a free text annotation. A remote attacker can supply crafted input to inject arbitrary PDF objects.
User interaction is required to open or interact with the generated PDF for injected actions to trigger.
Affected software
jspdf
How to mitigate CVE-2026-31898
Install security update from vendor's website.
jspdf - update to 4.2.1