Vulnerability-Lookup

GHSA-F5VJ-F2HX-8M93

Vulnerability from github – Published: 2026-07-20 22:01 – Updated: 2026-07-20 22:01

Summary

webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints

Details

Impact

The internal /webpack-dev-server/open-editor and /webpack-dev-server/invalidate endpoints 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 them 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 (e.g. ~/.ssh/config). The file's contents are not returned to the attacker. Repeated requests can also spawn editor processes and force recompilations, degrading the developer's machine.

Patches

Fixed in webpack-dev-server 5.2.6 by rejecting cross-site requests to the /webpack-dev-server/open-editor and /webpack-dev-server/invalidate endpoints (see PR #5698).

Workarounds

None

Severity

4.7 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.2.5"
      },
      "package": {
        "ecosystem": "npm",
        "name": "webpack-dev-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-14620"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-352",
      "CWE-749"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-20T22:01:56Z",
    "nvd_published_at": "2026-07-03T17:16:53Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nThe internal `/webpack-dev-server/open-editor` and `/webpack-dev-server/invalidate` endpoints perform state-changing actions on any `GET` request, without verifying that the request originated from the dev server\u0027s own page. Any website a developer visits while the dev server is running can trigger them cross-origin with no interaction beyond the visit.\n\nAn attacker can open an arbitrary existing local file in the developer\u0027s editor, including files outside the project root (e.g. `~/.ssh/config`). The file\u0027s contents are not returned to the attacker. Repeated requests can also spawn editor processes and force recompilations, degrading the developer\u0027s machine.\n\n### Patches\n\nFixed in `webpack-dev-server` 5.2.6 by rejecting cross-site requests to the `/webpack-dev-server/open-editor` and `/webpack-dev-server/invalidate` endpoints (see [PR #5698](https://github.com/webpack/webpack-dev-server/pull/5698)).\n\n### Workarounds\n\nNone",
  "id": "GHSA-f5vj-f2hx-8m93",
  "modified": "2026-07-20T22:01:56Z",
  "published": "2026-07-20T22:01:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-f5vj-f2hx-8m93"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14620"
    },
    {
      "type": "WEB",
      "url": "https://github.com/webpack/webpack-dev-server/pull/5698"
    },
    {
      "type": "WEB",
      "url": "https://github.com/webpack/webpack-dev-server/commit/80cd9eea54975fe632a518d8bd902a260f374e7c"
    },
    {
      "type": "WEB",
      "url": "https://cna.openjsf.org/security-advisories.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/webpack/webpack-dev-server"
    },
    {
      "type": "WEB",
      "url": "https://github.com/webpack/webpack-dev-server/releases/tag/v5.2.6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints"
}

CVE-2026-14620 (GCVE-0-2026-14620)

Vulnerability from cvelistv5 – Published: 2026-07-03 17:00 – Updated: 2026-07-06 15:54

Title

webpack-dev-server vulnerable to cross-site request forgery via internal developer endpoints

Summary

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.

Severity

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-06 15:54 UTC

CWE

CWE-352 - Cross-Site Request Forgery (CSRF)
CWE-749 - Exposed Dangerous Method or Function

Assigner

openjs CNA under the redhat root

CNA scorecard C 65/100 over 106 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/webpack/webpack-dev-server/sec…
https://cna.openjsf.org/security-advisories.html

Impacted products

1 product

Vendor	Product	Version
webpack-dev-server	webpack-dev-server	Affected: 0 , < 5.2.6 (semver) Unaffected: 5.2.6 (semver)

Credits

Pig-Tail bjohansebas UlisesGascon

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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