WS-2020-0042 | Mend Vulnerability Database

Vulnerability DatabaseWS-2020-0042

WS-2020-0042

Published:May 19, 2026

Updated:May 20, 2026

acorn is vulnerable to REGEX DoS. A regex of the form /[x-\ud800]/u causes the parser to enter an infinite loop. attackers may leverage the vulnerability leading to a Denial of Service since the string is not valid UTF16 and it results in it being sanitized before reaching the parser.

Affected Packages

acorn (CDN_JS):

Affected version(s) >=7.0.0 <7.1.1

Fix Suggestion:

Update to version 7.1.1

acorn (CDN_JS):

Affected version(s) >=5.5.0 <5.7.4

Fix Suggestion:

Update to version 5.7.4

acorn (CDN_JS):

Affected version(s) >=6.0.0 <6.4.1

Fix Suggestion:

Update to version 6.4.1

spyder-terminal (CONDA):

Affected version(s) =0.3.0 <0.3.1

Fix Suggestion:

Update to version 0.3.1

jupyterlab-nvdashboard (CONDA):

Affected version(s) =0.1.11 <0.3.0

Fix Suggestion:

Update to version 0.3.0

jsdom (CONDA):

Affected version(s) >=11.11.0 <=14.0.0

Fix Suggestion:

Update to version no_fix

translate-gard (CONDA):

Affected version(s) >=1.0.3 <=1.0.4

Fix Suggestion:

Update to version no_fix

genenotebook (CONDA):

Affected version(s) >=0.1.1 <0.3.0

Fix Suggestion:

Update to version 0.3.0

emscripten (CONDA):

Affected version(s) =2.0.8

Fix Suggestion:

Update to version no_fix

plotly-orca (CONDA):

Affected version(s) =3.4.3 <4.1.1

Fix Suggestion:

Update to version 4.1.1

acorn (NPM):

Affected version(s) >=7.0.0 <7.1.1

Fix Suggestion:

Update to version 7.1.1

acorn (NPM):

Affected version(s) >=6.0.0 <6.4.1

Fix Suggestion:

Update to version 6.4.1

acorn (NPM):

Affected version(s) >=5.5.0 <5.7.4

Fix Suggestion:

Update to version 5.7.4

romano.vue (NUGET):

Affected version(s) =1.0.0 <1.0.1

Fix Suggestion:

Update to version 1.0.1

graphql.typed.client (NUGET):

Affected version(s) >=0.1.0 <=0.1.3

Fix Suggestion:

Update to version no_fix

vuejs.netcore (NUGET):

Affected version(s) >=1.0.2 <1.1.1

Fix Suggestion:

Update to version 1.1.1

indianadavy.vuejswebapitemplate.csharp (NUGET):

Affected version(s) =1.0.0 <1.0.1

Fix Suggestion:

Update to version 1.0.1

gr.pagerender.razor (NUGET):

Affected version(s) >=1.6.0 <1.8.0

Fix Suggestion:

Update to version 1.8.0

chutzpah (NUGET):

Affected version(s) >=4.4.0 <4.4.10

Fix Suggestion:

Update to version 4.4.10

cloudscribe.templates (NUGET):

Affected version(s) >=3.0.1 <5.2.0

Fix Suggestion:

Update to version 5.2.0

corevuewebtest (NUGET):

Affected version(s) =3.0.100 <3.0.101

Fix Suggestion:

Update to version 3.0.101

pwptemplatecms (NUGET):

Affected version(s) >=0.0.1 <=0.0.2

Fix Suggestion:

Update to version no_fix

richardtmiles/carbonphp (PHP):

Affected version(s) =dev-carbon <dev-feature/serialized_db_fix

Fix Suggestion:

Update to version dev-feature/serialized_db_fix

postboxcms/postbox (PHP):

Affected version(s) =dev-dependabot/npm_and_yarn/ssri-6.0.2 <dev-dependabot/npm_and_yarn/ws-6.2.2

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/ws-6.2.2

sergiosgc/jsonschema-form (PHP):

Affected version(s) >=dev-dependabot/npm_and_yarn/js/elliptic-6.5.4 <=dev-dependabot/npm_and_yarn/js/y18n-4.0.1

Fix Suggestion:

Update to version no_fix

designsecurity/progpilot (PHP):

Affected version(s) =dev-master <dev-move_togha

Fix Suggestion:

Update to version dev-move_togha

bizprove/canvas (PHP):

Affected version(s) =dev-master <v1.0

Fix Suggestion:

Update to version v1.0

gheb/nn (PHP):

Affected version(s) =dev-installed-example <dev-master

Fix Suggestion:

Update to version dev-master

mage2tv/magento-cache-clean (PHP):

Affected version(s) >=0.0.43 <1.0.10

Fix Suggestion:

Update to version 1.0.10

timoetting/kirby-builder (PHP):

Affected version(s) =2.0.0 <v2.0.0

Fix Suggestion:

Update to version v2.0.0

humanmade/workflows (PHP):

Affected version(s) =0.4.7 <0.4.8-rc.1

Fix Suggestion:

Update to version 0.4.8-rc.1

postboxcms/postbox (PHP):

Affected version(s) >=dev-dependabot/npm_and_yarn/url-parse-1.5.3 <dev-dependabot/npm_and_yarn/url-parse-1.5.10

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/url-parse-1.5.10

elegantweb/laravel-admin (PHP):

Affected version(s) =dev-master <1.0.0

Fix Suggestion:

Update to version 1.0.0

oxid-esales/wave-theme (PHP):

Affected version(s) =dev-motorrad <dev-oxscript-google-analytics

Fix Suggestion:

Update to version dev-oxscript-google-analytics

mage2tv/magento-cache-clean (PHP):

Affected version(s) >=1.0.21 <1.0.25

Fix Suggestion:

Update to version 1.0.25

designsecurity/progpilot (PHP):

Affected version(s) =v0.4.0 <v0.5.0

Fix Suggestion:

Update to version v0.5.0

postboxcms/postbox (PHP):

Affected version(s) >=dev-dependabot/composer/symfony/http-foundation-4.4.8 <dev-dependabot/npm_and_yarn/browserslist-4.16.6

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/browserslist-4.16.6

richardtmiles/carbonphp (PHP):

Affected version(s) =4.5.0 <dev-dependabot/npm_and_yarn/view/assets/react/terser-4.8.1

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/view/assets/react/terser-4.8.1

postboxcms/postbox (PHP):

Affected version(s) =dev-master <dev-package/dbo

Fix Suggestion:

Update to version dev-package/dbo

elegantweb/laravel-admin (PHP):

Affected version(s) >=v2.0.4 <dev-dependabot/npm_and_yarn/public/components/browserify-zlib/tar-2.2.2

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/public/components/browserify-zlib/tar-2.2.2

chrisbraybrooke/laravel-ecommerce (PHP):

Affected version(s) =dev-dev <dev-form-field-key

Fix Suggestion:

Update to version dev-form-field-key

elegantweb/laravel-admin (PHP):

Affected version(s) =dev-dependabot/npm_and_yarn/public/components/admin-lte/chart.js-2.9.4 <dev-dependabot/npm_and_yarn/public/components/admin-lte/datatables.net-1.10.22

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/public/components/admin-lte/datatables.net-1.10.22

humanmade/workflows (PHP):

Affected version(s) =dev-gh-actions <dev-master

Fix Suggestion:

Update to version dev-master

scancode/portal-module (PHP):

Affected version(s) >=v0.0.1 <dev-dependabot/npm_and_yarn/Resources/assets/coreui/decode-uri-component-0.2.2

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/Resources/assets/coreui/decode-uri-component-0.2.2

mage2tv/magento-cache-clean (PHP):

Affected version(s) >=1.0.11 <1.0.19

Fix Suggestion:

Update to version 1.0.19

emolinablas/laravel-vue-crud (PHP):

Affected version(s) =1.0.0 <1.0.1

Fix Suggestion:

Update to version 1.0.1

postboxcms/postbox (PHP):

Affected version(s) =dev-dependabot/npm_and_yarn/axios-0.21.1 <dev-sanketraut-patch-1

Fix Suggestion:

Update to version dev-sanketraut-patch-1

mage2tv/magento-cache-clean (PHP):

Affected version(s) =dev-win-compatibility <0.0.1

Fix Suggestion:

Update to version 0.0.1

richardtmiles/carbonphp (PHP):

Affected version(s) >=4.0.0 <dev-dependabot/npm_and_yarn/crypto-js-4.2.0

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/crypto-js-4.2.0

elegantweb/laravel-admin (PHP):

Affected version(s) >=v2.0.0 <v2.0.3

Fix Suggestion:

Update to version v2.0.3

carbonorm/carbonphp (PHP):

Affected version(s) >=4.0.0 <dev-dependabot/npm_and_yarn/crypto-js-4.2.0

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/crypto-js-4.2.0

chrisbraybrooke/laravel-ecommerce (PHP):

Affected version(s) =0.0.4 <0.0.11

Fix Suggestion:

Update to version 0.0.11

scancode/portal-module (PHP):

Affected version(s) >=v1.0.7 <v1.0.12

Fix Suggestion:

Update to version v1.0.12

flexxia/flexprimeng (PHP):

Affected version(s) =dev-anguarJs-v7 <dev-dependabot/npm_and_yarn/css/postcss/y18n-3.2.2

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/css/postcss/y18n-3.2.2

carbonorm/carbonphp (PHP):

Affected version(s) >=4.5.0 <5.0.0

Fix Suggestion:

Update to version 5.0.0

richardtmiles/carbonphp (PHP):

Affected version(s) =4.9.0 <5.0.0

Fix Suggestion:

Update to version 5.0.0

elegantweb/laravel-admin (PHP):

Affected version(s) >=1.0.x-dev <v1.0.2

Fix Suggestion:

Update to version v1.0.2

richardtmiles/carbonphp (PHP):

Affected version(s) =dev-Reacting <dev-RestUpdate_PrimaryKeyValidation

Fix Suggestion:

Update to version dev-RestUpdate_PrimaryKeyValidation

elegantweb/laravel-admin (PHP):

Affected version(s) >=v1.0.3 <v1.1.2

Fix Suggestion:

Update to version v1.1.2

designsecurity/progpilot (PHP):

Affected version(s) >=v0.6.0 <v1.0.1

Fix Suggestion:

Update to version v1.0.1

richardtmiles/carbonphp (PHP):

Affected version(s) =dev-RichardTMiles-patch-1 <1.0.1

Fix Suggestion:

Update to version 1.0.1

postboxcms/postbox (PHP):

Affected version(s) >=dev-dependabot/npm_and_yarn/elliptic-6.5.4 <dev-feature/ISSUE-39

Fix Suggestion:

Update to version dev-feature/ISSUE-39

mage2tv/magento-cache-clean (PHP):

Affected version(s) >=0.0.7 <0.0.28

Fix Suggestion:

Update to version 0.0.28

zymawy/ironside-core (PHP):

Affected version(s) =dev-master <dev-utils

Fix Suggestion:

Update to version dev-utils

timoetting/kirby-builder (PHP):

Affected version(s) =2.0.3 <v2.0.3

Fix Suggestion:

Update to version v2.0.3

scancode/portal-module (PHP):

Affected version(s) >=v1.0.0 <dev-dependabot/npm_and_yarn/Resources/assets/coreui/path-parse-1.0.7

Fix Suggestion:

Update to version dev-dependabot/npm_and_yarn/Resources/assets/coreui/path-parse-1.0.7

designsecurity/progpilot (PHP):

Affected version(s) =dev-chainedcalls <dev-feature/funccallconditions

Fix Suggestion:

Update to version dev-feature/funccallconditions

mayronalves/laravel-core (PHP):

Affected version(s) >=v1.0.0 <dev-dependabot/composer/symfony/mime-4.4.1

Fix Suggestion:

Update to version dev-dependabot/composer/symfony/mime-4.4.1

designsecurity/progpilot (PHP):

Affected version(s) =dev-dependabot/npm_and_yarn/package/src/progpilot/Transformations/Js/acorn-5.7.4 <dev-php82

Fix Suggestion:

Update to version dev-php82

trezebits/trezevel-gallery (PHP):

Affected version(s) =dev-master

Fix Suggestion:

Update to version no_fix

timoetting/kirby-builder (PHP):

Affected version(s) =2.0.2 <v2.0.2

Fix Suggestion:

Update to version v2.0.2

seidemann-web/wave-theme (PHP):

Affected version(s) =dev-motorrad <dev-omage-theme

Fix Suggestion:

Update to version dev-omage-theme

flexxia/flexprimeng (PHP):

Affected version(s) >=dev-dev-demo-primeng-chart <dev-update-angularjs

Fix Suggestion:

Update to version dev-update-angularjs

richardtmiles/carbonphp (PHP):

Affected version(s) =dev-StatsCoach <dev-always_send_request_body

Fix Suggestion:

Update to version dev-always_send_request_body

chrisbraybrooke/laravel-ecommerce (PHP):

Affected version(s) >=0.0.18 <0.0.56

Fix Suggestion:

Update to version 0.0.56

humanmade/coding-standards (PHP):

Affected version(s) >=v0.4.0 <v0.4.2

Fix Suggestion:

Update to version v0.4.2

jupyterlab-nvdashboard (PYTHON):

Affected version(s) =0.1.11 <0.3.0

Fix Suggestion:

Update to version 0.3.0

spyder-terminal (PYTHON):

Affected version(s) =0.3.0 <0.3.1

Fix Suggestion:

Update to version 0.3.1

rustimate-client (RUST):

Affected version(s) >=0.0.1 <=0.1.0

Fix Suggestion:

Update to version no_fix

electrscash (RUST):

Affected version(s) =1.0.0 <1.1.1

Fix Suggestion:

Update to version 1.1.1

moxie-dom (RUST):

Affected version(s) =0.1.0 <0.1.1-alpha.0

Fix Suggestion:

Update to version 0.1.1-alpha.0

Related Resources (1)

https://github.com/acornjs/acorn/commit/b5c17877ac0511e31579ea31e7650ba1a5871e51

Do you need more information?

CVSS v4

Base Score:

8.7

Attack Vector

NETWORK

Attack Complexity

LOW

Attack Requirements

NONE

Privileges Required

NONE

User Interaction

NONE

Vulnerable System Confidentiality

NONE

Vulnerable System Integrity

NONE

Vulnerable System Availability

HIGH

Subsequent System Confidentiality

NONE

Subsequent System Integrity

NONE

Subsequent System Availability

NONE

CVSS v3

Base Score:

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH