6.1

CVE-2026-116803: DOMPurify before 3.4.17 DOM XSS via IN_PLACE Hook-Detached Subtrees

Awaiting analysis
AliasesGHSA-mrv2-3pqr-j5jrDEBIAN-CVE-2026-116803UBUNTU-CVE-2026-116803
Published 26-10-2026Last modified 31-10-2026

Vulnerability summary

CVE-2026-116803 is a medium (CVSS 6.1) vulnerability in cure53 dompurify. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.1, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.16%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 26-10-2026
    PublishedVulnerability first disclosed.
  2. 31-10-2026
    Last modifiedVulnerability information updated.

Description

DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to keep event handlers armed when an IN_PLACE hook removes a parent or sibling node. Attacker markup in detached subtrees is never walked or neutralized, so handlers like img onerror fire after sanitize() returns, causing DOM XSS.

CVSS metrics

8 scores · 5 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

27-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Cure531 product
Debian1 product
  • node-dompurifyAll versions (No fix recorded) | < 3.4.17+dfsg-1
Npm1 product
  • dompurify< 3.4.17
Ubuntu1 product
  • node-dompurifyAll versions (No fix recorded)

4 vendors · 4 products

References

9 links