VulnSocial

CVE-2026-33438Disclosure(stirling / stirling_pdf)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. Versions starting in 2.1.5 and prior to 2.5.2 have Denial of Service (DoS) vulnerability in the Stirling-PDF watermark functionality (`/api/v1/security/add-watermark` endpoint). The vulnerability allows authenticated users to cause resource exhaustion and server crashes by providing extreme values for the `fontSize` and `widthSpacer` parameters. Version 2.5.2 patches the issue.

stirling CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Exploit / PoC references
Weakness type (CWE)
CWE-770

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • stirling_pdf

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • General: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-03-26); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
stirling
Products
stirling_pdf

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-03-26: 2Mentions · 2026-04-15: 1Technical Details · 2026-03-26: 203-2604-15
Signal classification2 categories
Disclosure
266.7%
General
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-03-262
Disclosure1General1
2026-04-151
Disclosure1
Full discourse3 posts
  • bearstech@bearstech
    Disclosure

    Gabriel Diyan, un étudiant de 2eme année découvre une faille de sécurité dans Stirling PDF (CVE-2026-33438). "Après avoir découvert la vulnérabilité, je souhaitais expérimenter concrètement le processus de signalement…" ✅ 20/20 excellent travail 👍 👉 https://factuel.univ-lorraine.fr/article/un-etudiant-de-telecom-nancy-decouvre-une-nouvelle-faille-de-cybersecurite-sur-un-logiciel-open-source/

    Post summary

    The post announces that a student discovered CVE‑2026‑33438 in Stirling PDF and intends to report it, but no technical or exploit details are provided.

    17051178.1K
    17.5K followersView on X
  • CVE@CVEnew
    General

    CVE-2026-33438 Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. Versions starting in 2.1.5 and prior to 2.5.2 have Denial… https://www.cve.org/CVERecord?id=CVE-2026-33438

    Post summary

    The post references CVE-2026-33438 and describes a denial‑of‑service issue in specific Stirling‑PDF versions, but offers no PoC, exploit, or patch information.

    00010356
    56.9K followersView on X
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-33438 Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. Versions starting in 2.1.5 and prior to 2.5.2 have Denial… https://www.cve.org/CVERecord?id=CVE-2026-33438 ----- Traducción: CVE-2026-33438 Sti… http://infoflow.cloud`

    Post summary

    This post announces CVE‑2026‑33438 for Stirling‑PDF, noting affected versions and a denial‑of‑service issue, with a link to the official CVE record.

    0000035
    65 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appstirlingstirling_pdf---

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