Vulnerability-Lookup

CVE-2026-30964 (GCVE-0-2026-30964)

Vulnerability from cvelistv5 – Published: 2026-03-10 17:16 – Updated: 2026-03-10 17:57

Title

Webauthn Framework: allowed_origins collapses URL-like origins to host-only values, bypassing exact origin validation

Summary

web-auth/webauthn-lib is an open source set of PHP libraries and a Symfony bundle to allow developers to integrate that authentication mechanism into their web applications. Prior to 5.2.4, when allowed_origins is configured, CheckAllowedOrigins reduces URL-like values to their host component and accepts on host match alone. This makes exact origin policies impossible to express: scheme and port differences are silently ignored. This vulnerability is fixed in 5.2.4.

Severity

5.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-10 17:57 UTC

CWE

CWE-346 - Origin Validation Error

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7877 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/web-auth/webauthn-framework/se…	x_refsource_CONFIRM
https://github.com/web-auth/webauthn-framework/co…	x_refsource_MISC
https://github.com/web-auth/webauthn-framework/co…	x_refsource_MISC

Impacted products

3 products

Vendor	Product	Version	CPE status
web-auth	webauthn-framework	Affected: < 5.2.4	guessed
web-auth	webauthn-lib	Affected: < 5.2.4	guessed
web-auth	webauthn-symfony-bundle	Affected: < 5.2.4	guessed

Show details on NVD website

JSON

To clipboard

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CLEANSTART-2026-BK93612 (CVE-2026-30964)

Vulnerability from cleanstart – Published: 2026-10-31 11:58 – Updated: 2026-08-14 09:39 – Source website

Summary

web-auth/webauthn-lib is an open source set of PHP libraries and a Symfony bundle to allow developers to integrate that authentication mechanism into their web applications

Details

Security vulnerability affects the nextcloud package. web-auth/webauthn-lib is an open source set of PHP libraries and a Symfony bundle to allow developers to integrate that authentication mechanism into their web applications.

Severity

5.4 (Medium)


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

References

URL

Type

	https://github.com/cleanstart-dev/cleanstart-secu…	ADVISORY
	https://osv.dev/vulnerability/CVE-2026-30964	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-30964	WEB

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "nextcloud",
        "purl": "pkg:apk/cleanstart/nextcloud?arch=noarch"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "32.0.3-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Security vulnerability affects the nextcloud package. web-auth/webauthn-lib is an open source set of PHP libraries and a Symfony bundle to allow developers to integrate that authentication mechanism into their web applications.",
  "id": "CLEANSTART-2026-BK93612",
  "modified": "2026-08-14T09:39:36Z",
  "published": "2026-10-31T11:58:48.866361Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-BK93612.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-30964"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30964"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "web-auth/webauthn-lib is an open source set of PHP libraries and a Symfony bundle to allow developers to integrate that authentication mechanism into their web applications",
  "upstream": [
    "CVE-2026-30964"
  ]
}

FKIE_CVE-2026-30964

Vulnerability from fkie_nvd - Published: 2026-03-10 18:18 - Updated: 2026-06-17 10:33

Severity

5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/web-auth/webauthn-framework/commit/535cc3c2dcbd9c3dfd5e00a254ad4a984e5e7839	Patch
security-advisories@github.com	https://github.com/web-auth/webauthn-framework/commit/b4cd9a4394c35fcac6080fd2f84f4f58a30abc01	Patch
security-advisories@github.com	https://github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6hr8-7ggm	Exploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6hr8-7ggm	Exploit, Vendor Advisory

Impacted products

Vendor	Product	Version
spomky-labs	webauthn-lib	*
spomky-labs	webauthn-symfony-bundle	*
spomky-labs	webauthn_framwork	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
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          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.2.4"
            }
          ]
        },
        {
          "product": "webauthn-lib",
          "vendor": "web-auth",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.2.4"
            }
          ]
        },
        {
          "product": "webauthn-symfony-bundle",
          "vendor": "web-auth",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.2.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:spomky-labs:webauthn-lib:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2B3FDA39-7E8E-4393-B618-705FC6E261B5",
              "versionEndExcluding": "5.2.4",
              "versionStartIncluding": "5.2.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:spomky-labs:webauthn-symfony-bundle:*:*:*:*:*:*:*:*",
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            },
            {
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              "matchCriteriaId": "B2D412A1-79BE-433D-9700-ED728B93761C",
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              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "web-auth/webauthn-lib is an open source set of PHP libraries and a Symfony bundle to allow developers to integrate that authentication mechanism into their web applications. Prior to 5.2.4, when allowed_origins is configured, CheckAllowedOrigins reduces URL-like values to their host component and accepts on host match alone. This makes exact origin policies impossible to express: scheme and port differences are silently ignored. This vulnerability is fixed in 5.2.4."
    },
    {
      "lang": "es",
      "value": "web-auth/webauthn-lib es un conjunto de c\u00f3digo abierto de bibliotecas PHP y un paquete de Symfony para permitir a los desarrolladores integrar ese mecanismo de autenticaci\u00f3n en sus aplicaciones web. Antes de la versi\u00f3n 5.2.4, cuando se configura allowed_origins, CheckAllowedOrigins reduce los valores similares a URL a su componente de host y acepta solo la coincidencia de host. Esto hace que las pol\u00edticas de origen exactas sean imposibles de expresar: las diferencias de esquema y puerto se ignoran silenciosamente. Esta vulnerabilidad se corrige en la versi\u00f3n 5.2.4."
    }
  ],
  "id": "CVE-2026-30964",
  "lastModified": "2026-06-17T10:33:14.180",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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              "automatable": "no"
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            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-10T17:57:30.314634Z",
          "version": "2.0.3"
        }
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  },
  "published": "2026-03-10T18:18:55.410",
  "references": [
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      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
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      "source": "security-advisories@github.com",
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      "url": "https://github.com/web-auth/webauthn-framework/commit/b4cd9a4394c35fcac6080fd2f84f4f58a30abc01"
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    {
      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6hr8-7ggm"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
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        "Vendor Advisory"
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      "url": "https://github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6hr8-7ggm"
    }
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-346"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-F7PM-6HR8-7GGM

Vulnerability from github – Published: 2026-03-10 01:19 – Updated: 2026-03-10 22:21

Summary

Webauthn Framework: allowed_origins collapses URL-like origins to host-only values, bypassing exact origin validation

Details

Summary

When allowed_origins is configured, CheckAllowedOrigins reduces URL-like values to their host component and accepts on host match alone. This makes exact origin policies impossible to express: scheme and port differences are silently ignored.

Details

CheckAllowedOrigins stores each configured allowed origin as:

parse_url($allowedOrigin)['host'] ?? $allowedOrigin

and later reduces the received clientDataJSON.origin the same way:

parse_url($C->origin)['host'] ?? $C->origin

If the reduced value matches, the method returns early. As a result, for the normal allowed_origins path, the later HTTPS check is not reached.

This differs from WebAuthn Level 2, which requires verifying that C.origin matches the RP's origin (scheme + host + port), separately from verifying that authData.rpIdHash matches the expected RP ID.

Affected code: - CheckAllowedOrigins.php

Spec references: - §7.1 Registering a New Credential - §7.2 Verifying an Authentication Assertion - CollectedClientData.origin

PoC

Configuration:

webauthn:
  allowed_origins:
    - https://login.example.com:8443
  allow_subdomains: false

Send a registration or authentication response whose clientDataJSON.origin is:

https://login.example.com:9443

Observed: the response is accepted, because both values are reduced to login.example.com.

Expected: the response should be rejected, because https://login.example.com:8443 and https://login.example.com:9443 are different origins.

Impact

This is an origin validation error (CWE-346) affecting deployments that use allowed_origins. The most practical browser-facing scenario is same-host / different-port origin confusion. In non-browser or custom clients, scheme confusion may also be relevant.

Fix

Fixed in version 5.2.4 by rewriting CheckAllowedOrigins to perform full origin comparison (scheme + host + port) as required by the WebAuthn spec:

Origins configured with a scheme (e.g. https://example.com:8443) are now stored and compared as full scheme://host[:port] values, with default port normalization (443 for HTTPS, 80 for HTTP).
Origins configured without a scheme are still matched by host only, for backward compatibility.
Subdomain matching now also verifies scheme and port consistency.

See commit b4cd9a43.

Mitigation

Upgrade to web-auth/webauthn-framework (or web-auth/webauthn-lib / web-auth/webauthn-symfony-bundle) >= 5.2.4.

Severity

5.4 (Medium)


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

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "web-auth/webauthn-framework"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.2.0"
            },
            {
              "fixed": "5.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "web-auth/webauthn-lib"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.2.0"
            },
            {
              "fixed": "5.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "web-auth/webauthn-symfony-bundle"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.2.0"
            },
            {
              "fixed": "5.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-30964"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-346"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-10T01:19:46Z",
    "nvd_published_at": "2026-03-10T18:18:55Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nWhen `allowed_origins` is configured, `CheckAllowedOrigins` reduces URL-like values to their `host` component and accepts on host match alone. This makes exact origin policies impossible to express: scheme and port differences are silently ignored.\n\n### Details\n`CheckAllowedOrigins` stores each configured allowed origin as:\n\n```php\nparse_url($allowedOrigin)[\u0027host\u0027] ?? $allowedOrigin\n```\n\nand later reduces the received `clientDataJSON.origin` the same way:\n\n```php\nparse_url($C-\u003eorigin)[\u0027host\u0027] ?? $C-\u003eorigin\n```\n\nIf the reduced value matches, the method returns early. As a result, for the normal `allowed_origins` path, the later HTTPS check is not reached.\n\nThis differs from [WebAuthn Level 2](https://www.w3.org/TR/webauthn-2/), which requires verifying that `C.origin` matches the RP\u0027s origin (scheme + host + port), separately from verifying that `authData.rpIdHash` matches the expected RP ID.\n\n**Affected code:**\n- [CheckAllowedOrigins.php](https://github.com/web-auth/webauthn-framework/blob/d58906e/src/webauthn/src/CeremonyStep/CheckAllowedOrigins.php)\n\n**Spec references:**\n- [\u00a77.1 Registering a New Credential](https://www.w3.org/TR/webauthn-2/#sctn-registering-a-new-credential)\n- [\u00a77.2 Verifying an Authentication Assertion](https://www.w3.org/TR/webauthn-2/#sctn-verifying-assertion)\n- [CollectedClientData.origin](https://www.w3.org/TR/webauthn-2/#dom-collectedclientdata-origin)\n\n### PoC\nConfiguration:\n\n```yaml\nwebauthn:\n  allowed_origins:\n    - https://login.example.com:8443\n  allow_subdomains: false\n```\n\nSend a registration or authentication response whose `clientDataJSON.origin` is:\n\n```text\nhttps://login.example.com:9443\n```\n\n**Observed:** the response is accepted, because both values are reduced to `login.example.com`.\n\n**Expected:** the response should be rejected, because `https://login.example.com:8443` and `https://login.example.com:9443` are different origins.\n\n### Impact\nThis is an origin validation error (CWE-346) affecting deployments that use `allowed_origins`. The most practical browser-facing scenario is same-host / different-port origin confusion. In non-browser or custom clients, scheme confusion may also be relevant.\n\n### Fix\nFixed in version **5.2.4** by rewriting `CheckAllowedOrigins` to perform full origin comparison (scheme + host + port) as required by the WebAuthn spec:\n\n- Origins configured with a scheme (e.g. `https://example.com:8443`) are now stored and compared as full `scheme://host[:port]` values, with default port normalization (443 for HTTPS, 80 for HTTP).\n- Origins configured without a scheme are still matched by host only, for backward compatibility.\n- Subdomain matching now also verifies scheme and port consistency.\n\nSee commit [b4cd9a43](https://github.com/web-auth/webauthn-framework/commit/b4cd9a43).\n\n### Mitigation\nUpgrade to `web-auth/webauthn-framework` (or `web-auth/webauthn-lib` / `web-auth/webauthn-symfony-bundle`) **\u003e= 5.2.4**.",
  "id": "GHSA-f7pm-6hr8-7ggm",
  "modified": "2026-03-10T22:21:15Z",
  "published": "2026-03-10T01:19:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/web-auth/webauthn-framework/security/advisories/GHSA-f7pm-6hr8-7ggm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30964"
    },
    {
      "type": "WEB",
      "url": "https://github.com/web-auth/webauthn-framework/commit/535cc3c2dcbd9c3dfd5e00a254ad4a984e5e7839"
    },
    {
      "type": "WEB",
      "url": "https://github.com/web-auth/webauthn-framework/commit/b4cd9a4394c35fcac6080fd2f84f4f58a30abc01"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/web-auth/webauthn-framework"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Webauthn Framework: allowed_origins collapses URL-like origins to host-only values, bypassing exact origin validation"
}

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.

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Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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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.
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Action not permitted

CVE-2026-30964 (GCVE-0-2026-30964)

CLEANSTART-2026-BK93612 (CVE-2026-30964)

FKIE_CVE-2026-30964

GHSA-F7PM-6HR8-7GGM

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