Vulnerability-Lookup

GHSA-VVVV-983W-R7PV

Vulnerability from github – Published: 2026-05-05 18:42 – Updated: 2026-05-13 14:19

Summary

@workos/authkit-session has an Open Redirect via state-derived redirect target

Details

An open redirect vulnerability exists in AuthService.handleCallback due to insufficient validation of the returnPathname value derived from the OAuth state parameter.

The state parameter is round-tripped through the identity provider (IdP) and can be influenced by an attacker. The handleCallback function decodes and returns returnPathname without enforcing restrictions on origin or scheme. As a result, attacker-controlled values (e.g., https://evil.com/, //evil.com, or similar variants) may be returned to the application.

If this value is used directly in a redirect (e.g., via an HTTP Location header, framework redirect helpers, or client-side navigation), it may cause the user to be redirected to an external, attacker-controlled site.

Security Impact This issue may be used to facilitate phishing or user redirection attacks by leveraging the trust of the originating domain. For example, an attacker could craft a link that directs a user through a legitimate authentication flow and then redirects them to an external site.

The severity depends on how returnPathname is used by the application. Exploitation requires:

The application to use returnPathname as a redirect target, and
The absence of downstream validation or allowlisting

This vulnerability does not enable authentication bypass, token disclosure, or direct account compromise on its own, but may increase the effectiveness of social engineering attacks when combined with user interaction.

Vulnerability Type CWE-601: URL Redirection to Untrusted Site (Open Redirect)

Patches Patched in https://github.com/workos/authkit-session/releases/tag/v0.5.1

Severity

4.3 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@workos/authkit-session"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42565"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-05T18:42:26Z",
    "nvd_published_at": "2026-05-11T20:25:42Z",
    "severity": "MODERATE"
  },
  "details": "An open redirect vulnerability exists in `AuthService.handleCallback` due to insufficient validation of the `returnPathname` value derived from the OAuth `state` parameter.\n\nThe `state` parameter is round-tripped through the identity provider (IdP) and can be influenced by an attacker. The handleCallback function decodes and returns returnPathname without enforcing restrictions on origin or scheme. As a result, attacker-controlled values (e.g., `https://evil.com/`, `//evil.com`, or similar variants) may be returned to the application.\n\nIf this value is used directly in a redirect (e.g., via an HTTP `Location` header, framework redirect helpers, or client-side navigation), it may cause the user to be redirected to an external, attacker-controlled site.\n\n**Security Impact**\nThis issue may be used to facilitate phishing or user redirection attacks by leveraging the trust of the originating domain. For example, an attacker could craft a link that directs a user through a legitimate authentication flow and then redirects them to an external site.\n\nThe severity depends on how `returnPathname` is used by the application. Exploitation requires:\n\n* The application to use `returnPathname` as a redirect target, and\n* The absence of downstream validation or allowlisting\n\nThis vulnerability does not enable authentication bypass, token disclosure, or direct account compromise on its own, but may increase the effectiveness of social engineering attacks when combined with user interaction.\n\n**Vulnerability Type**\nCWE-601: URL Redirection to Untrusted Site (Open Redirect)\n\n**Patches**\nPatched in https://github.com/workos/authkit-session/releases/tag/v0.5.1",
  "id": "GHSA-vvvv-983w-r7pv",
  "modified": "2026-05-13T14:19:01Z",
  "published": "2026-05-05T18:42:26Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/workos/authkit-session/security/advisories/GHSA-vvvv-983w-r7pv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42565"
    },
    {
      "type": "WEB",
      "url": "https://github.com/workos/authkit-session/commit/f56e1d6214a93160759e5677b7a3d772b244db39"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/workos/authkit-session"
    },
    {
      "type": "WEB",
      "url": "https://github.com/workos/authkit-session/releases/tag/v0.5.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@workos/authkit-session has an Open Redirect via state-derived redirect target"
}

CVE-2026-42565 (GCVE-0-2026-42565)

Vulnerability from cvelistv5 – Published: 2026-05-11 19:01 – Updated: 2026-05-12 16:30

Title

@workos/authkit-session: Open Redirect via state-derived redirect target

Summary

@workos/authkit-session is a toolkit for building WorkOS AuthKit framework integrations. Prior to 0.5.1, an open redirect vulnerability exists in AuthService.handleCallback due to insufficient validation of the returnPathname value derived from the OAuth state parameter. The state parameter is round-tripped through the identity provider (IdP) and can be influenced by an attacker. The handleCallback function decodes and returns returnPathname without enforcing restrictions on origin or scheme. As a result, attacker-controlled values may be returned to the application. If this value is used directly in a redirect, it may cause the user to be redirected to an external, attacker-controlled site. This vulnerability is fixed in 0.5.1.

Severity

4.3 (Medium)


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

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/workos/authkit-session/securit…	x_refsource_CONFIRM
https://github.com/workos/authkit-session/commit/…	x_refsource_MISC
https://github.com/workos/authkit-session/release…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
workos	authkit-session	Affected: < 0.5.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-42565",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-12T16:30:19.568319Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "authkit-session",
          "vendor": "workos",
          "versions": [
            {
              "status": "affected",
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            }
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        }
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      "descriptions": [
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          "lang": "en",
          "value": "@workos/authkit-session is a toolkit for building WorkOS AuthKit framework integrations. Prior to 0.5.1, an open redirect vulnerability exists in AuthService.handleCallback due to insufficient validation of the returnPathname value derived from the OAuth state parameter. The state parameter is round-tripped through the identity provider (IdP) and can be influenced by an attacker. The handleCallback function decodes and returns returnPathname without enforcing restrictions on origin or scheme. As a result, attacker-controlled values may be returned to the application. If this value is used directly in a redirect, it may cause the user to be redirected to an external, attacker-controlled site. This vulnerability is fixed in 0.5.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
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            "userInteraction": "REQUIRED",
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              "lang": "en",
              "type": "CWE"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:01:28.340Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      "references": [
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          "name": "https://github.com/workos/authkit-session/security/advisories/GHSA-vvvv-983w-r7pv",
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          "url": "https://github.com/workos/authkit-session/security/advisories/GHSA-vvvv-983w-r7pv"
        },
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      "source": {
        "advisory": "GHSA-vvvv-983w-r7pv",
        "discovery": "UNKNOWN"
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      "title": "@workos/authkit-session: Open Redirect via state-derived redirect target"
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  "cveMetadata": {
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    "datePublished": "2026-05-11T19:01:28.340Z",
    "dateReserved": "2026-04-28T17:26:12.084Z",
    "dateUpdated": "2026-05-12T16:30:33.422Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-VVVV-983W-R7PV

CVE-2026-42565 (GCVE-0-2026-42565)

Tags

Sightings

Nomenclature