CVE-2026-33436: Stirling-PDF is a locally hosted web application that facilitates various operations on PDF files

Q: How do I fix CVE-2026-33436?

stirling pdf: upgrade to 2.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33436 being exploited?

CVE-2026-33436 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33436 affect?

CVE-2026-33436 affects stirling pdf. Severity is low (CVSS 3.1). 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 witho

Q: How urgent is CVE-2026-33436?

Priority 17/100. Public exploit reference

Routine

LOW 3.1UPGRADE

CVE-2026-33436 is a low-severity flaw (CVSS 3.1) affecting stirling pdf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 without sanitization. An attacker can craft a file with a malicious filename containing JavaScript that executes in the uploading user's browser context, resulting in reflected XSS. The issue affects numerous upload

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	3.1 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-20, CWE-79, CWE-116
Published	2026-04-17
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-17 21:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

stirlingpdf stirling pdf UPGRADE

Affected: < 2.0.0

Fixed in: 2.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy stirling-pdf || rpm -q stirling-pdf || stirling-pdf --version

2. UPGRADE to 2.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade stirling-pdf

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade stirling-pdf

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-33436?

stirling pdf: upgrade to 2.0.0. Exact commands for each OS are on this page.

Is CVE-2026-33436 being exploited?

CVE-2026-33436 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-2026-33436 affect?

CVE-2026-33436 affects stirling pdf. Severity is low (CVSS 3.1). 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 witho

How urgent is CVE-2026-33436?

Priority 17/100. Public exploit reference

Related CVEs

CVE-2026-41580 MEDIUM 6.1 UPGRADE Stirling-PDF is a locally hosted web application that facilitates various operations on PDF files

References

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