4.7

CVE-2026-106444: handlebars-lang handlebars.js Improper Encoding or Escaping of Output

CVSS: 4.7v3.1MediumAwaiting analysis
AliasesUBUNTU-CVE-2026-106444DEBIAN-CVE-2026-106444CGA-2rw6-pw8q-6rc7
Published 06-10-2026Last modified 06-10-2026
Open JSON

Vulnerability summary

CVE-2026-106444 is a medium (CVSS 4.7) Improper Encoding or Escaping of Output vulnerability in handlebars-lang handlebars.js. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.6% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.29%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-10-2026
    PublishedVulnerability first disclosed.
  2. 06-10-2026
    Last modifiedVulnerability information updated.

Description

Handlebars provides the power necessary to let users build semantic templates. From 4.0.0 until 4.7.10, Handlebars.precompile() uses quotedString() in lib/handlebars/compiler/code-gen.js to emit static template text into generated JavaScript without escaping sequences that terminate an enclosing HTML script element. When an application precompiles attacker-controlled template text and embeds the generated source directly in an inline script element, a closing script delimiter can end the element and cause following attacker-controlled markup to be parsed and executed. Ordinary server-side rendering and precompiled templates served as external JavaScript files are not affected. This issue is fixed in version 4.7.10.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

07-10-202618-10-2026
EPSS score
0.29%

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

Chainguard36 products
  • eco-jessAll versions (No fix recorded)
  • gitlab-rails-ce-18.11All versions (No fix recorded)
  • gitlab-rails-ce-18.8All versions (No fix recorded)
  • gitlab-rails-ce-18.9All versions (No fix recorded)
  • gitlab-rails-ce-assets-fips-19.4All versions (No fix recorded)
Wolfi8 products
  • lernaAll versions (No fix recorded) | < 10.0.1-r10
  • nextcloud-server-33All versions (No fix recorded) | < 33.0.9-r7
  • opensearch-dashboards-3All versions (No fix recorded) | < 3.8.0-r13
  • prismAll versions (No fix recorded) | < 5.16.0-r16
  • rancher-api-ui< 1.2.3-r15
Ubuntu2 products
  • node-handlebarsAll versions (No fix recorded)
  • ruby-handlebars-assetsAll versions (No fix recorded)
Debian1 product
  • node-handlebarsAll versions (No fix recorded) | < 3:4.7.10-1
Handlebars-lang1 product
Npm1 product
  • handlebars≥ 4.0.0, < 4.7.10

6 vendors · 49 products

References

10 links