Vulnerability-Lookup

GHSA-GMJ3-5XFG-Q3QG

Vulnerability from github – Published: 2026-08-15 15:30 – Updated: 2026-08-15 21:30

Details

Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow password reset link poisoning via the request Host header in _default_email_password_reset and _default_welcome_send.

Both default emails emit a link of the form $base/login/$code, whose authority comes from the request Host header, or from X-Forwarded-Host under behind_proxy (obtained from Dancer2's request->base function). A POST to /login carrying submit_reset and a username needs no authentication: it stores a fresh reset code against that account and mails the account holder a link to a host of the sender's choosing. The welcome mail takes the same path when the application calls create_user with email_welcome set.

Through 0.711 the handlers read request->uri_base and request->base directly; Versions 0.712 and later provide an uri_base configuration key that defaults to the untrusted request->uri_base when unset.

The default configuration with reset_password_handler enabled and the default message text, a recipient who follows the link hands a working reset code to the sender's host, which is enough to take over the account.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-15689"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-640"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T14:17:06Z",
    "severity": null
  },
  "details": "Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow password reset link poisoning via the request Host header in _default_email_password_reset and _default_welcome_send.\n\nBoth default emails emit a link of the form `$base/login/$code`, whose authority comes from the request Host header, or from X-Forwarded-Host under behind_proxy (obtained from Dancer2\u0027s request-\u003ebase function). A POST to /login carrying submit_reset and a username needs no authentication: it stores a fresh reset code against that account and mails the account holder a link to a host of the sender\u0027s choosing. The welcome mail takes the same path when the application calls create_user with email_welcome set.\n\nThrough 0.711 the handlers read `request-\u003euri_base` and `request-\u003ebase` directly; Versions 0.712 and later provide an uri_base configuration key that defaults to the untrusted `request-\u003euri_base` when unset.\n\nThe default configuration with reset_password_handler enabled and the default message text, a recipient who follows the link hands a working reset code to the sender\u0027s host, which is enough to take over the account.",
  "id": "GHSA-gmj3-5xfg-q3qg",
  "modified": "2026-08-15T21:30:58Z",
  "published": "2026-08-15T15:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15689"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.711/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L1031-1053"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.711/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L1097-1121"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.712/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L178-194"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.713/changes"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.713/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L178-196"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/15/4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-15689 (GCVE-0-2026-15689)

Vulnerability from cvelistv5 – Published: 2026-08-15 13:25 – Updated: 2026-08-15 19:06

Title

Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow password reset link poisoning via the request Host header in _default_email_password_reset and _default_welcome_send

Summary

Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow password reset link poisoning via the request Host header in _default_email_password_reset and _default_welcome_send. Both default emails emit a link of the form `$base/login/$code`, whose authority comes from the request Host header, or from X-Forwarded-Host under behind_proxy (obtained from Dancer2's request->base function). A POST to /login carrying submit_reset and a username needs no authentication: it stores a fresh reset code against that account and mails the account holder a link to a host of the sender's choosing. The welcome mail takes the same path when the application calls create_user with email_welcome set. Through 0.711 the handlers read `request->uri_base` and `request->base` directly; Versions 0.712 and later provide an uri_base configuration key that defaults to the untrusted `request->uri_base` when unset. The default configuration with reset_password_handler enabled and the default message text, a recipient who follows the link hands a working reset code to the sender's host, which is enough to take over the account.

Severity

No CVSS data available.

CWE

CWE-640 - Weak Password Recovery Mechanism for Forgotten Password

Assigner

CPANSec

References

6 references

URL	Tags
https://metacpan.org/release/ABEVERLEY/Dancer2-Pl…
https://metacpan.org/release/ABEVERLEY/Dancer2-Pl…
https://metacpan.org/release/ABEVERLEY/Dancer2-Pl…
https://metacpan.org/release/ABEVERLEY/Dancer2-Pl…
https://metacpan.org/release/ABEVERLEY/Dancer2-Pl…	release-notes
http://www.openwall.com/lists/oss-security/2026/08/15/4

Impacted products

1 product

Vendor	Product	Version
ABEVERLEY	Dancer2::Plugin::Auth::Extensible	Affected: 0 , ≤ 0.713 (custom)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-08-15T19:06:35.186Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/15/4"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Dancer2-Plugin-Auth-Extensible",
          "product": "Dancer2::Plugin::Auth::Extensible",
          "programFiles": [
            "lib/Dancer2/Plugin/Auth/Extensible.pm"
          ],
          "programRoutines": [
            {
              "name": "Dancer2::Plugin::Auth::Extensible::_default_email_password_reset"
            },
            {
              "name": "Dancer2::Plugin::Auth::Extensible::_default_welcome_send"
            },
            {
              "name": "Dancer2::Plugin::Auth::Extensible::password_reset_send"
            }
          ],
          "repo": "https://github.com/PerlDancer/Dancer2-Plugin-Auth-Extensible",
          "vendor": "ABEVERLEY",
          "versions": [
            {
              "lessThanOrEqual": "0.713",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow password reset link poisoning via the request Host header in _default_email_password_reset and _default_welcome_send.\n\nBoth default emails emit a link of the form `$base/login/$code`, whose authority comes from the request Host header, or from X-Forwarded-Host under behind_proxy (obtained from Dancer2\u0027s request-\u003ebase function). A POST to /login carrying submit_reset and a username needs no authentication: it stores a fresh reset code against that account and mails the account holder a link to a host of the sender\u0027s choosing. The welcome mail takes the same path when the application calls create_user with email_welcome set.\n\nThrough 0.711 the handlers read `request-\u003euri_base` and `request-\u003ebase` directly; Versions 0.712 and later provide an uri_base configuration key that defaults to the untrusted `request-\u003euri_base` when unset.\n\nThe default configuration with reset_password_handler enabled and the default message text, a recipient who follows the link hands a working reset code to the sender\u0027s host, which is enough to take over the account."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-640",
              "description": "CWE-640 Weak Password Recovery Mechanism for Forgotten Password",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-15T13:25:26.318Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.711/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L1031-1053"
        },
        {
          "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.711/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L1097-1121"
        },
        {
          "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.712/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L178-194"
        },
        {
          "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.713/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L178-196"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.713/changes"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow password reset link poisoning via the request Host header in _default_email_password_reset and _default_welcome_send",
      "workarounds": [
        {
          "lang": "en",
          "value": "No fixed release is available. In 0.712 and later, set the uri_base configuration key to the application\u0027s own base URL; otherwise reject requests whose host is not an expected application hostname, including X-Forwarded-Host under behind_proxy."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-15689",
    "datePublished": "2026-08-15T13:25:26.318Z",
    "dateReserved": "2026-07-14T01:03:59.438Z",
    "dateUpdated": "2026-08-15T19:06:35.186Z",
    "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.

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.

Action not permitted

GHSA-GMJ3-5XFG-Q3QG

CVE-2026-15689 (GCVE-0-2026-15689)

Tags

Sightings

Nomenclature