What is CVE-2026-33436?

CVE-2026-33436 is a low-severity vulnerability in Stirlingpdf Stirling_pdf, classified under Improper Input Validation. CVSS score: 3.1/10. Published 2026-04-17.

How severe is CVE-2026-33436?

Low severity. CVSS v3 base score is 3.1 out of 10.

XSS in Stirlingpdf Stirling_pdf

CVE-2026-33436

Stirling-PDF is a locally hosted web application that facilitates various operations on PDF files. In versions prior to 2.0.0, file upload endpoints render user-supplied filenames directly into HTML using unsafe methods like innerHTML with…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.001 (30.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Stirlingpdf Stirling_pdf
Stirling-tools Stirling-pdf — versions < 2.0.0

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33436?: CVE-2026-33436 is a low-severity vulnerability in Stirlingpdf Stirling_pdf, classified under Improper Input Validation. CVSS score: 3.1/10. Published 2026-04-17.
How severe is CVE-2026-33436?: Low severity. CVSS v3 base score is 3.1 out of 10.