VulnSocial

CVE-2026-49978Disclosure(cure53 / dompurify)

LOWCVSS 6.1 · MEDIUM

Signal is active with 2 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

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.

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0.0/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Other references
Weakness type (CWE)
CWE-79

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

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

  • dompurify

Threat summary

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

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • Peaked at 2 mentions on most recent observed day (2026-07-14)
  • 3 total mentions across 2 days

Affected systems

Vendors
cure53
Products
dompurify

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-06-15: 1Mentions · 2026-07-14: 2Technical Details · 2026-06-15: 1Technical Details · 2026-07-14: 206-1507-14
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-06-151
Disclosure1
2026-07-142
Disclosure2
Full discourse3 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-49978 DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached … https://www.cve.org/CVERecord?id=CVE-2026-49978 ----- Traducción: CVE-2026-49978 DOM… http://infoflow.cloud`

    Post summary

    CVE‑2026‑49978 highlights a DOM‑only cross‑site scripting flaw in DOMPurify before version 3.4.7 where shadow DOM content may be inadequately sanitized.

    0000060
    92 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-49978 DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached … https://www.cve.org/CVERecord?id=CVE-2026-49978

    Post summary

    The text discloses CVE‑2026‑49978, an XSS flaw in DOMPurify where IN_PLACE sanitization could miss shadow contents before v3.4.7; no PoC, exploit, patch, or false‑positive information is provided.

    00000731
    57.8K followersView on X
  • DailyCVE@dailycve
    Disclosure

    🟠 DOMPurify, XSS via Shadow DOM in Template, #CVE-2026-49978 (Moderate) -DC-Jun2026-433 https://dailycve.com/dompurify-xss-via-shadow-dom-in-template-cve-2026-49978-moderate-dc-jun2026-433/

    Post summary

    The entry announces CVE‑2026‑49978, a moderate‑severity XSS flaw in DOMPurify involving Shadow DOM, but offers no Proof of Concept, exploit code, patch, or evidence of active exploitation.

    0000030
    212 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appcure53dompurify---

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