Vulnerability-Lookup

CVE-2025-66803 (GCVE-0-2025-66803)

Vulnerability from cvelistv5 – Published: 2026-01-20 00:00 – Updated: 2026-01-21 15:26

Summary

Race condition in the turbo-frame element handler in Hotwired Turbo before 8.0.x causes logout operations to fail when delayed frame responses reapply session cookies after logout. This can be exploited by remote attackers via selective network delays (e.g. delaying requests based on sequence or timing) or by physically proximate attackers when the race condition occurs naturally on shared computers.

Severity ?

4.8 (Medium)


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

CWE

Assigner

mitre

References

URL

Tags

	https://github.com/hotwired/turbo/pull/1399
	https://turbo.hotwired.dev/handbook/frames
	https://github.com/hotwired/turbo/security/adviso…

Show details on NVD website

JSON

To clipboard

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              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
              "version": "3.1"
            }
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      "references": [
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          "url": "https://github.com/hotwired/turbo/pull/1399"
        },
        {
          "url": "https://turbo.hotwired.dev/handbook/frames"
        },
        {
          "url": "https://github.com/hotwired/turbo/security/advisories/GHSA-qppm-g56g-fpvp"
        }
      ]
    }
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  "cveMetadata": {
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    "datePublished": "2026-01-20T00:00:00.000Z",
    "dateReserved": "2025-12-08T00:00:00.000Z",
    "dateUpdated": "2026-01-21T15:26:53.433Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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}

FKIE_CVE-2025-66803

Vulnerability from fkie_nvd - Published: 2026-01-20 19:15 - Updated: 2026-01-21 16:16

Severity ?

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

Summary

References

	URL	Tags
	cve@mitre.org	https://github.com/hotwired/turbo/pull/1399
	cve@mitre.org	https://github.com/hotwired/turbo/security/advisories/GHSA-qppm-g56g-fpvp
	cve@mitre.org	https://turbo.hotwired.dev/handbook/frames

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Race condition in the turbo-frame element handler in Hotwired Turbo before 8.0.x causes logout operations to fail when delayed frame responses reapply session cookies after logout. This can be exploited by remote attackers via selective network delays (e.g. delaying requests based on sequence or timing) or by physically proximate attackers when the race condition occurs naturally on shared computers."
    }
  ],
  "id": "CVE-2025-66803",
  "lastModified": "2026-01-21T16:16:07.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 2.5,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-20T19:15:49.537",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/hotwired/turbo/pull/1399"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/hotwired/turbo/security/advisories/GHSA-qppm-g56g-fpvp"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://turbo.hotwired.dev/handbook/frames"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

GHSA-QPPM-G56G-FPVP

Vulnerability from github – Published: 2026-01-20 18:58 – Updated: 2026-01-21 21:11

Summary

Turbo Frame responses can restore stale session cookies

Details

Summary

A race condition in Turbo Frames allows delayed HTTP responses to restore stale session cookies after session-modifying operations.

Details

Browsers automatically process Set-Cookie headers from HTTP responses. When a Turbo Frame request is in-flight during a session-modifying action (such as logout), the delayed response may include a Set-Cookie header reflecting the session state at request time. This can result in stale session cookies being restored after the session was intentionally modified or invalidated.

This condition can occur naturally on slow networks. An active network attacker capable of delaying responses could potentially exploit this to restore previous session state.

### Impact Applications using Turbo Frames with cookie-based session storage may experience: - Session state reversion after logout - Unintended restoration of previous authentication state

The impact is limited to applications using client-side cookie storage for sessions. Applications using server-side session stores (Redis, database, etc.) are not meaningfully affected, as the server-side session state remains authoritative.

Patches

Upgrade to Turbo 8.0.21 or later. The fix cancels in-flight Turbo Frame requests when: - The frame element is disconnected from the DOM - The frame's disabled attribute is set - The frame's src attribute is cleared

Workarounds

Use server-side session storage instead of a cookie store like Rails's cookie store
Ensure logout flows remove or disable Turbo Frame elements before invalidating sessions

References

https://github.com/hotwired/turbo/pull/1399

Severity ?

1.7 (Low)


                  
                    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 8.0.20"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@hotwired/turbo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.0.21"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-66803"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362",
      "CWE-367",
      "CWE-613"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-20T18:58:15Z",
    "nvd_published_at": "2026-01-20T19:15:49Z",
    "severity": "LOW"
  },
  "details": "###  Summary\nA race condition in Turbo Frames allows delayed HTTP responses to restore stale session cookies after session-modifying operations.\n\n### Details\nBrowsers automatically process Set-Cookie headers from HTTP responses. When a Turbo Frame request is in-flight during a session-modifying action (such as logout), the delayed response may include a Set-Cookie header reflecting the session state at request time. This can result in stale session cookies being restored after the session was intentionally modified or invalidated.\n\nThis condition can occur naturally on slow networks. An active network attacker capable of delaying responses could potentially exploit this to restore previous session state.\n\n  ### Impact\n Applications using Turbo Frames with cookie-based session storage may experience:\n  - Session state reversion after logout\n  - Unintended restoration of previous authentication state\n\nThe impact is limited to applications using client-side cookie storage for sessions. Applications using server-side session stores (Redis, database, etc.) are not meaningfully affected, as the server-side session state remains authoritative.\n\n###  Patches\n  Upgrade to Turbo 8.0.21 or later. The fix cancels in-flight Turbo Frame requests when:\n  - The frame element is disconnected from the DOM\n  - The frame\u0027s disabled attribute is set\n  - The frame\u0027s src attribute is cleared\n\n###  Workarounds\n  - Use server-side session storage instead of a cookie store like Rails\u0027s cookie store\n  - Ensure logout flows remove or disable Turbo Frame elements before invalidating sessions\n\n###  References\n  - https://github.com/hotwired/turbo/pull/1399",
  "id": "GHSA-qppm-g56g-fpvp",
  "modified": "2026-01-21T21:11:06Z",
  "published": "2026-01-20T18:58:15Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/hotwired/turbo/security/advisories/GHSA-qppm-g56g-fpvp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66803"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hotwired/turbo/pull/1399"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hotwired/turbo/commit/899df356e9f4b3303cca217cd14b3f846edda10d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/hotwired/turbo"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hotwired/turbo/releases/tag/v8.0.21"
    },
    {
      "type": "WEB",
      "url": "https://turbo.hotwired.dev/handbook/frames"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Turbo Frame responses can restore stale session cookies"
}

Sightings

Author	Source	Type	Date

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-2025-66803 (GCVE-0-2025-66803)

FKIE_CVE-2025-66803

GHSA-QPPM-G56G-FPVP

Summary

Details

Patches

Workarounds

References

Tags

Sightings

Nomenclature