GHSA-gmj8-hvj3-49mw

Suggest an improvement
Source
https://github.com/advisories/GHSA-gmj8-hvj3-49mw
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-gmj8-hvj3-49mw/GHSA-gmj8-hvj3-49mw.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-gmj8-hvj3-49mw
Aliases
  • CVE-2026-126067
Published
2026-11-10T21:25:18Z
Modified
2026-11-10T21:45:03Z
Severity
  • 3.1 (Low) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Action Pack: Missing SameSite attribute on session cookies from Action Pack session stores
Details

Impact

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.

Details

In the fixed releases, every session store sets the session cookie's SameSite attribute from cookies_same_site_protection when its options have no :same_site key. An explicit same_site: option, including same_site: nil, and a :same_site value in a store's DEFAULT_OPTIONS still take precedence.

Workarounds

Pass same_site: when configuring the session store, for example config.session_store :cache_store, same_site: :lax.

Releases

The fixed releases are available at the normal locations.

Patches for those who cannot upgrade at once:

Credit

This issue was responsibly reported by HackerOne researcher tjvc.

Database specific 
{
    "cwe_ids": [
        "CWE-352"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-11-10T21:25:18Z",
    "nvd_published_at": null,
    "severity": "LOW"
}
References

Affected packages

RubyGems / actionpack

Package

Name
actionpack
Purl
pkg:gem/actionpack

Affected ranges

Type
ECOSYSTEM
Events
Introduced
8.1.0.beta1
Fixed
8.1.4.1

Affected versions

8.*
8.1.0.beta1
8.1.0.rc1
8.1.0
8.1.1
8.1.2
8.1.2.1
8.1.3
8.1.3.1
8.1.4

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-gmj8-hvj3-49mw/GHSA-gmj8-hvj3-49mw.json"

RubyGems / actionpack

Package

Name
actionpack
Purl
pkg:gem/actionpack

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
8.0.5.2

Affected versions

0.*
0.9.0
0.9.5
1.*
1.0.0
1.0.1
1.1.0
1.2.0
1.3.0
1.3.1
1.4.0
1.5.0
1.5.1
1.6.0
1.7.0
1.8.0
1.8.1
1.9.0
1.9.1
1.10.1
1.10.2
1.11.0
1.11.1
1.11.2
1.12.0
1.12.1
1.12.2
1.12.3
1.12.4
1.12.5
1.13.0
1.13.1
1.13.2
1.13.3
1.13.4
1.13.5
1.13.6
2.*
2.0.0
2.0.1
2.0.2
2.0.4
2.0.5
2.1.0
2.1.1
2.1.2
2.2.2
2.2.3
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
2.3.7
2.3.8.pre1
2.3.8
2.3.9.pre
2.3.9
2.3.10
2.3.11
2.3.12
2.3.14
2.3.15
2.3.16
2.3.17
2.3.18
3.*
3.0.0.beta
3.0.0.beta2
3.0.0.beta3
3.0.0.beta4
3.0.0.rc
3.0.0.rc2
3.0.0
3.0.1
3.0.2
3.0.3
3.0.4.rc1
3.0.4
3.0.5.rc1
3.0.5
3.0.6.rc1
3.0.6.rc2
3.0.6
3.0.7.rc1
3.0.7.rc2
3.0.7
3.0.8.rc1
3.0.8.rc2
3.0.8.rc4
3.0.8
3.0.9.rc1
3.0.9.rc3
3.0.9.rc4
3.0.9.rc5
3.0.9
3.0.10.rc1
3.0.10
3.0.11
3.0.12.rc1
3.0.12
3.0.13.rc1
3.0.13
3.0.14
3.0.15
3.0.16
3.0.17
3.0.18
3.0.19
3.0.20
3.1.0.beta1
3.1.0.rc1
3.1.0.rc2
3.1.0.rc3
3.1.0.rc4
3.1.0.rc5
3.1.0.rc6
3.1.0.rc8
3.1.0
3.1.1.rc1
3.1.1.rc2
3.1.1.rc3
3.1.1
3.1.2.rc1
3.1.2.rc2
3.1.2
3.1.3
3.1.4.rc1
3.1.4
3.1.5.rc1
3.1.5
3.1.6
3.1.7
3.1.8
3.1.9
3.1.10
3.1.11
3.1.12
3.2.0.rc1
3.2.0.rc2
3.2.0
3.2.1
3.2.2.rc1
3.2.2
3.2.3.rc1
3.2.3.rc2
3.2.3
3.2.4.rc1
3.2.4
3.2.5
3.2.6
3.2.7.rc1
3.2.7
3.2.8.rc1
3.2.8.rc2
3.2.8
3.2.9.rc1
3.2.9.rc2
3.2.9.rc3
3.2.9
3.2.10
3.2.11
3.2.12
3.2.13.rc1
3.2.13.rc2
3.2.13
3.2.14.rc1
3.2.14.rc2
3.2.14
3.2.15.rc1
3.2.15.rc2
3.2.15.rc3
3.2.15
3.2.16
3.2.17
3.2.18
3.2.19
3.2.20
3.2.21
3.2.22
3.2.22.1
3.2.22.2
3.2.22.3
3.2.22.4
3.2.22.5
4.*
4.0.0.beta1
4.0.0.rc1
4.0.0.rc2
4.0.0
4.0.1.rc1
4.0.1.rc2
4.0.1.rc3
4.0.1.rc4
4.0.1
4.0.2
4.0.3
4.0.4.rc1
4.0.4
4.0.5
4.0.6.rc1
4.0.6.rc2
4.0.6.rc3
4.0.6
4.0.7
4.0.8
4.0.9
4.0.10.rc1
4.0.10.rc2
4.0.10
4.0.11
4.0.11.1
4.0.12
4.0.13.rc1
4.0.13
4.1.0.beta1
4.1.0.beta2
4.1.0.rc1
4.1.0.rc2
4.1.0
4.1.1
4.1.2.rc1
4.1.2.rc2
4.1.2.rc3
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6.rc1
4.1.6.rc2
4.1.6
4.1.7
4.1.7.1
4.1.8
4.1.9.rc1
4.1.9
4.1.10.rc1
4.1.10.rc2
4.1.10.rc3
4.1.10.rc4
4.1.10
4.1.11
4.1.12.rc1
4.1.12
4.1.13.rc1
4.1.13
4.1.14.rc1
4.1.14.rc2
4.1.14
4.1.14.1
4.1.14.2
4.1.15.rc1
4.1.15
4.1.16.rc1
4.1.16
4.2.0.beta1
4.2.0.beta2
4.2.0.beta3
4.2.0.beta4
4.2.0.rc1
4.2.0.rc2
4.2.0.rc3
4.2.0
4.2.1.rc1
4.2.1.rc2
4.2.1.rc3
4.2.1.rc4
4.2.1
4.2.2
4.2.3.rc1
4.2.3
4.2.4.rc1
4.2.4
4.2.5.rc1
4.2.5.rc2
4.2.5
4.2.5.1
4.2.5.2
4.2.6.rc1
4.2.6
4.2.7.rc1
4.2.7
4.2.7.1
4.2.8.rc1
4.2.8
4.2.9.rc1
4.2.9.rc2
4.2.9
4.2.10.rc1
4.2.10
4.2.11
4.2.11.1
4.2.11.2
4.2.11.3
5.*
5.0.0.beta1
5.0.0.beta1.1
5.0.0.beta2
5.0.0.beta3
5.0.0.beta4
5.0.0.racecar1
5.0.0.rc1
5.0.0.rc2
5.0.0
5.0.0.1
5.0.1.rc1
5.0.1.rc2
5.0.1
5.0.2.rc1
5.0.2
5.0.3
5.0.4.rc1
5.0.4
5.0.5.rc1
5.0.5.rc2
5.0.5
5.0.6.rc1
5.0.6
5.0.7
5.0.7.1
5.0.7.2
5.1.0.beta1
5.1.0.rc1
5.1.0.rc2
5.1.0
5.1.1
5.1.2.rc1
5.1.2
5.1.3.rc1
5.1.3.rc2
5.1.3.rc3
5.1.3
5.1.4.rc1
5.1.4
5.1.5.rc1
5.1.5
5.1.6
5.1.6.1
5.1.6.2
5.1.7.rc1
5.1.7
5.2.0.beta1
5.2.0.beta2
5.2.0.rc1
5.2.0.rc2
5.2.0
5.2.1.rc1
5.2.1
5.2.1.1
5.2.2.rc1
5.2.2
5.2.2.1
5.2.3.rc1
5.2.3
5.2.4.rc1
5.2.4
5.2.4.1
5.2.4.2
5.2.4.3
5.2.4.4
5.2.4.5
5.2.4.6
5.2.5
5.2.6
5.2.6.1
5.2.6.2
5.2.6.3
5.2.7
5.2.7.1
5.2.8
5.2.8.1
6.*
6.0.0.beta1
6.0.0.beta2
6.0.0.beta3
6.0.0.rc1
6.0.0.rc2
6.0.0
6.0.1.rc1
6.0.1
6.0.2.rc1
6.0.2.rc2
6.0.2
6.0.2.1
6.0.2.2
6.0.3.rc1
6.0.3
6.0.3.1
6.0.3.2
6.0.3.3
6.0.3.4
6.0.3.5
6.0.3.6
6.0.3.7
6.0.4
6.0.4.1
6.0.4.2
6.0.4.3
6.0.4.4
6.0.4.5
6.0.4.6
6.0.4.7
6.0.4.8
6.0.5
6.0.5.1
6.0.6
6.0.6.1
6.1.0.rc1
6.1.0.rc2
6.1.0
6.1.1
6.1.2
6.1.2.1
6.1.3
6.1.3.1
6.1.3.2
6.1.4
6.1.4.1
6.1.4.2
6.1.4.3
6.1.4.4
6.1.4.5
6.1.4.6
6.1.4.7
6.1.5
6.1.5.1
6.1.6
6.1.6.1
6.1.7
6.1.7.1
6.1.7.2
6.1.7.3
6.1.7.4
6.1.7.5
6.1.7.6
6.1.7.7
6.1.7.8
6.1.7.9
6.1.7.10
7.*
7.0.0.alpha1
7.0.0.alpha2
7.0.0.rc1
7.0.0.rc2
7.0.0.rc3
7.0.0
7.0.1
7.0.2
7.0.2.1
7.0.2.2
7.0.2.3
7.0.2.4
7.0.3
7.0.3.1
7.0.4
7.0.4.1
7.0.4.2
7.0.4.3
7.0.5
7.0.5.1
7.0.6
7.0.7
7.0.7.1
7.0.7.2
7.0.8
7.0.8.1
7.0.8.2
7.0.8.3
7.0.8.4
7.0.8.5
7.0.8.6
7.0.8.7
7.0.10
7.1.0.beta1
7.1.0.rc1
7.1.0.rc2
7.1.0
7.1.1
7.1.2
7.1.3
7.1.3.1
7.1.3.2
7.1.3.3
7.1.3.4
7.1.4
7.1.4.1
7.1.4.2
7.1.5
7.1.5.1
7.1.5.2
7.1.6
7.2.0.beta1
7.2.0.beta2
7.2.0.beta3
7.2.0.rc1
7.2.0
7.2.1
7.2.1.1
7.2.1.2
7.2.2
7.2.2.1
7.2.2.2
7.2.3
7.2.3.1
7.2.3.2
7.2.4
8.*
8.0.0.beta1
8.0.0.rc1
8.0.0.rc2
8.0.0
8.0.0.1
8.0.1
8.0.2
8.0.2.1
8.0.3
8.0.4
8.0.4.1
8.0.5
8.0.5.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/11/GHSA-gmj8-hvj3-49mw/GHSA-gmj8-hvj3-49mw.json"