5.4

CVE-2026-113661: apostrophecms apostrophe Cross-site Scripting

CVSS: 5.4v3.1MediumDeferred
AliasesGHSA-cv27-6wvh-8x7jCGA-vxq6-9m97-6vh4CGA-cqgh-73rf-435f
Published 20-10-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-113661 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in apostrophecms apostrophe. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.26%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-10-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Prior to sanitize-html 2.18.0, a non-default configuration that allows meta refresh elements and their http-equiv and content attributes can retain unsafe script or redirect destinations embedded in the refresh content value. This issue is fixed in sanitize-html 2.18.0.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

21-10-202621-10-2026
EPSS score
0.26%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apostrophecms2 products
Chainguard2 products
  • unleashAll versions (No fix recorded)
  • unleash-fipsAll versions (No fix recorded)
Npm1 product
  • sanitize-html< 2.18.0

3 vendors · 5 products

References

5 links