CVE-2026-126067 (GCVE-0-2026-126067)

Vulnerability from cvelistv5 – Published: 2026-11-10 20:29 – Updated: 2026-11-10 20:29
VLAI
Title
Action Pack: Missing SameSite attribute on session cookies from Action Pack session stores
Summary
Action Pack is a framework for handling and responding to web requests. Prior to 8.1.4.1 and 8.0.5.2, Action Pack session stores other than ActionDispatch::Session::CookieStore (CacheStore, MemCacheStore, and third-party stores built on AbstractStore, AbstractSecureStore or the session mixins) write the session cookie without a SameSite attribute, regardless of config.action_dispatch.cookies_same_site_protection, which defaults to :lax. Only CookieStore applies the configured policy. In browsers that do not treat a cookie without the attribute as SameSite=Lax, a cross-site request could carry the session cookie, possibly leading to cross-site request forgery against actions that do not verify an authenticity token, such as those of API-only applications. Applications are affected when they use a session store other than CookieStore and do not pass same_site: to config.session_store. This issue is fixed in versions 8.1.4.1 and 8.0.5.2.
Severity
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
CWE
  • CWE-352 - Cross-Site Request Forgery
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
rails rails Affected: >= 8.1, < 8.1.4.1
Affected: < 8.0.5.2
guessed Create a notification for this product.
Show details on NVD website
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        }
      ],
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          "url": "https://github.com/rails/rails/commit/2d9f502df941e31ce9bad0e846564f49396bed46"
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          "tags": [
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          "url": "https://github.com/rails/rails/commit/f2392996be723708271a8d30bfcf0edc221e53ef"
        },
        {
          "name": "https://github.com/rails/rails/releases/tag/v8.0.5.2",
          "tags": [
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          "url": "https://github.com/rails/rails/releases/tag/v8.0.5.2"
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          "tags": [
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      "source": {
        "advisory": "GHSA-gmj8-hvj3-49mw",
        "discovery": "UNKNOWN"
      },
      "title": "Action Pack: Missing SameSite attribute on session cookies from Action Pack session stores"
    }
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  "cveMetadata": {
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    "cveId": "CVE-2026-126067",
    "datePublished": "2026-11-10T20:29:44.430Z",
    "dateReserved": "2026-11-10T17:07:43.283Z",
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    "state": "PUBLISHED"
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      "percentile": "0.05712"
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    "nvd": {
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                "versions": [
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        "cveTags": [],
        "descriptions": [
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            "lang": "en",
            "value": "Action Pack is a framework for handling and responding to web requests. Prior to 8.1.4.1 and 8.0.5.2, Action Pack session stores other than ActionDispatch::Session::CookieStore (CacheStore, MemCacheStore, and third-party stores built on AbstractStore, AbstractSecureStore or the session mixins) write the session cookie without a SameSite attribute, regardless of config.action_dispatch.cookies_same_site_protection, which defaults to :lax. Only CookieStore applies the configured policy. In browsers that do not treat a cookie without the attribute as SameSite=Lax, a cross-site request could carry the session cookie, possibly leading to cross-site request forgery against actions that do not verify an authenticity token, such as those of API-only applications. Applications are affected when they use a session store other than CookieStore and do not pass same_site: to config.session_store. This issue is fixed in versions 8.1.4.1 and 8.0.5.2."
          }
        ],
        "id": "CVE-2026-126067",
        "lastModified": "2026-11-12T22:18:35.610",
        "metrics": {
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        "vulnStatus": "Awaiting Analysis",
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    "redhat_vex": {
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      "current_release_date": "2026-11-11T02:31:41+00:00",
      "cve": "CVE-2026-126067",
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      "initial_release_date": "2026-11-10T20:29:44.430000+00:00",
      "product_status:known_affected": "4",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "actionpack: Action Pack: Cross-Site Request Forgery via missing SameSite attribute on session cookies",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-126067.json",
      "version": "3"
    }
  }
}



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