Vulnerability-Lookup

CVE-2026-12746 (GCVE-0-2026-12746)

Vulnerability from cvelistv5 – Published: 2026-07-04 17:52 – Updated: 2026-07-06 14:56

Title

Dancer2::Plugin::Auth::OAuth::Provider versions before 0.23 for Perl do not support the OAuth 2.0 state parameter

Summary

Dancer2::Plugin::Auth::OAuth::Provider versions before 0.23 for Perl do not support the OAuth 2.0 state parameter. The authentication_url method builds the provider authorization redirect without issuing a state value, and the callback method exchanges the callback code and registers the resulting token into the session without verifying that the callback corresponds to an authorization request this session initiated. Any application that uses this plugin for OAuth 2.0 login is exposed to login cross-site request forgery: because the callback is not bound to the session that began the flow, an attacker who starts an authorization with their own provider account can deliver the resulting callback to a victim, causing the victim's session to complete the attacker's authorization and associating the attacker's provider identity and access token with that session. Where the application persists this as an account link, the attacker may retain access to the victim's account through their own provider credentials.

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-352 - Cross-Site Request Forgery (CSRF)

Assigner

CPANSec

References

4 references

URL	Tags
https://metacpan.org/release/BIAFRA/Dancer2-Plugi…
https://github.com/biafra/perl-Dancer2-Plugin-Aut…	patch
https://datatracker.ietf.org/doc/html/rfc6749#sec…	technical-description
http://www.openwall.com/lists/oss-security/2026/07/04/9

Impacted products

1 product

Vendor	Product	Version
BIAFRA	Dancer2::Plugin::Auth::OAuth::Provider	Affected: 0 , < 0.23 (custom)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-12746

Vulnerability from fkie_nvd - Published: 2026-07-04 18:16 - Updated: 2026-07-06 16:16

Severity

8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Summary

References

	URL	Tags
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://datatracker.ietf.org/doc/html/rfc6749#section-10.12
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://github.com/biafra/perl-Dancer2-Plugin-Auth-OAuth/commit/806420fc2abbe13bede4461475f2f3dcd7daf5f2.patch
	9b29abf9-4ab0-4765-b253-1875cd9b441e	https://metacpan.org/release/BIAFRA/Dancer2-Plugin-Auth-OAuth-0.23/diff/BIAFRA/Dancer2-Plugin-Auth-OAuth-0.22
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/07/04/9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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    {
      "affectedData": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Dancer2-Plugin-Auth-OAuth",
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            },
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          ],
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    }
  ],
  "id": "CVE-2026-12746",
  "lastModified": "2026-07-06T16:16:28.307",
  "metrics": {
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    },
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  "vulnStatus": "Received",
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}

GHSA-3F6X-Q3GV-GMFC

Vulnerability from github – Published: 2026-07-04 18:30 – Updated: 2026-07-04 21:30

Details

Dancer2::Plugin::Auth::OAuth::Provider versions before 0.23 for Perl do not support the OAuth 2.0 state parameter.

The authentication_url method builds the provider authorization redirect without issuing a state value, and the callback method exchanges the callback code and registers the resulting token into the session without verifying that the callback corresponds to an authorization request this session initiated.

Any application that uses this plugin for OAuth 2.0 login is exposed to login cross-site request forgery: because the callback is not bound to the session that began the flow, an attacker who starts an authorization with their own provider account can deliver the resulting callback to a victim, causing the victim's session to complete the attacker's authorization and associating the attacker's provider identity and access token with that session. Where the application persists this as an account link, the attacker may retain access to the victim's account through their own provider credentials.

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-12746"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-352"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-04T18:16:28Z",
    "severity": null
  },
  "details": "Dancer2::Plugin::Auth::OAuth::Provider versions before 0.23 for Perl do not support the OAuth 2.0 state parameter.\n\nThe authentication_url method builds the provider authorization redirect without issuing a state value, and the callback method exchanges the callback code and registers the resulting token into the session without verifying that the callback corresponds to an authorization request this session initiated.\n\nAny application that uses this plugin for OAuth 2.0 login is exposed to login cross-site request forgery: because the callback is not bound to the session that began the flow, an attacker who starts an authorization with their own provider account can deliver the resulting callback to a victim, causing the victim\u0027s session to complete the attacker\u0027s authorization and associating the attacker\u0027s provider identity and access token with that session. Where the application persists this as an account link, the attacker may retain access to the victim\u0027s account through their own provider credentials.",
  "id": "GHSA-3f6x-q3gv-gmfc",
  "modified": "2026-07-04T21:30:25Z",
  "published": "2026-07-04T18:30:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12746"
    },
    {
      "type": "WEB",
      "url": "https://github.com/biafra/perl-Dancer2-Plugin-Auth-OAuth/commit/806420fc2abbe13bede4461475f2f3dcd7daf5f2.patch"
    },
    {
      "type": "WEB",
      "url": "https://datatracker.ietf.org/doc/html/rfc6749#section-10.12"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/BIAFRA/Dancer2-Plugin-Auth-OAuth-0.23/diff/BIAFRA/Dancer2-Plugin-Auth-OAuth-0.22"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/07/04/9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

CVE-2026-12746 (GCVE-0-2026-12746)

FKIE_CVE-2026-12746

GHSA-3F6X-Q3GV-GMFC

Tags

Sightings

Nomenclature