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CVE-2026-9595 webpack-dev-server vulnerable to HMR WebSocket interception via permissive user proxies

🗓️ 15 Jun 2026 15:00:21Reported by openjsType 
cvelist
 cvelist
🔗 www.cve.org👁 72 Views

CVE-2026-9595: Broad proxy context in webpack development server leaks cookies and Origin via HMR WebSocket; patched in five two five.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ibm
IBM Security Bulletins
Security Bulletin: IBM Quantum Safe Explorer is affected by multiple vulnerabilites
6 Jul 202610:01
–ibm
cgr
Chainguard
CVE-2026-9595 vulnerabilities
25 Jun 202602:16
–cgr
circl
Circl
CVE-2026-9595
15 Jun 202614:51
–circl
cve
CVE
CVE-2026-9595
15 Jun 202615:00
–cve
euvd
EUVD
EUVD-2026-36729
17 Jun 202618:13
–euvd
github
Github Security Blog
webpack-dev-server vulnerable to HMR WebSocket interception via permissive user proxies
17 Jun 202618:13
–github
nvd
NVD
CVE-2026-9595
15 Jun 202616:16
–nvd
osv
OSV
CGA-24P8-MPPV-RP5C
13 Jul 202610:36
–osv
osv
OSV
CGA-25J5-GRCQ-68V9
23 Jun 202620:11
–osv
osv
OSV
CGA-27F6-F6MC-QPG3
13 Jul 202613:13
–osv
Rows per page
[
  {
    "vendor": "webpack-dev-server",
    "product": "webpack-dev-server",
    "defaultStatus": "unaffected",
    "versions": [
      {
        "versionType": "semver",
        "status": "affected",
        "version": "0",
        "lessThan": "5.2.5"
      },
      {
        "versionType": "semver",
        "status": "unaffected",
        "version": "5.2.5"
      }
    ],
    "packageURL": "pkg:npm/webpack-dev-server"
  }
]

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