webpack-dev-server up to 5.2.5 GET Request open-editor cross-site request forgery

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k1.53+

Summaryinfo

A vulnerability, which was classified as problematic, has been found in webpack-dev-server up to 5.2.5. This affects an unknown function of the file /webpack-dev-server/open-editor of the component GET Request Handler. This manipulation causes cross-site request forgery. This vulnerability appears as CVE-2026-14620. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in webpack-dev-server up to 5.2.5. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /webpack-dev-server/open-editor of the component GET Request Handler. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. The summary by CVE is:

webpack-dev-server versions 5.2.5 and earlier expose two internal developer endpoints, /webpack-dev-server/open-editor and /webpack-dev-server/invalidate, that perform state-changing actions on any GET request without verifying that the request originated from the dev server's own page. Any website a developer visits while the dev server is running can trigger these endpoints cross-origin with no interaction beyond the visit. An attacker can open an arbitrary existing local file in the developer's editor, including files outside the project root, and repeated requests can spawn editor processes and force recompilations that degrade the developer's machine. Patches: upgrade to webpack-dev-server 5.2.6. Workarounds: none.

The weakness was presented by UlisesGascon as GHSA-f5vj-f2hx-8m93. The advisory is shared at github.com. This vulnerability is known as CVE-2026-14620 since 07/03/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 5.2.6 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.7
CNA Vector (openjs): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross-site request forgery
CWE: CWE-352 / CWE-862 / CWE-863
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: webpack-dev-server 5.2.6

Timelineinfo

07/03/2026 Advisory disclosed
07/03/2026 +0 days CVE reserved
07/03/2026 +0 days VulDB entry created
07/03/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-f5vj-f2hx-8m93
Researcher: UlisesGascon
Status: Confirmed

CVE: CVE-2026-14620 (🔒)
GCVE (CVE): GCVE-0-2026-14620
GCVE (VulDB): GCVE-100-376153

Entryinfo

Created: 07/03/2026 19:30
Changes: 07/03/2026 19:30 (66)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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