CVE-2026-126081
- Source
- https://cve.org/CVERecord?id=CVE-2026-126081
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126081.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-126081
- Aliases
-
- GHSA-wm3x-v3qw-4jh3
- Downstream
- Published
- 2026-11-10T21:06:31Z
- Modified
- 2026-11-11T10:47:26Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
- Summary
- Action Pack: Possible Strong Parameters bypass in Parameters#each_key
- Details
-
Action Pack is a framework for handling and responding to web requests. Prior to 8.1.4.1 and 8.0.5.2, ActionController::Parameters#each_key delegates to the internal ActiveSupport::HashWithIndifferentAccess that holds the request parameters, so when called with a block it returns that hash instead of the Parameters instance. The hash does not respond to permitted?, so Active Model mass assignment (new, assign_attributes, update) accepts it without raising ActiveModel::ForbiddenAttributesError. An application that passes the return value of each_key to mass assignment could allow a remote, unauthenticated attacker to set attributes that the application does not permit, such as an authorization flag. This is an incomplete fix of CVE-2020-8164, which made each, each_pair and each_value return the Parameters instance but left each_key delegated. An application is affected if it passes the return value of ActionController::Parameters#each_key, called with a block, to mass assignment. Rails itself makes no such call. This issue is fixed in versions 8.1.4.1 and 8.0.5.2.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-915" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126081.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126081.json
- https://github.com/rails/rails/commit/2fc8838300133931e19eed3ea6cee76a7e83f19c
- https://github.com/rails/rails/commit/8ba746e0a786458c281060823f2ccc5c5f6312ac
- https://github.com/rails/rails/releases/tag/v8.0.5.2
- https://github.com/rails/rails/releases/tag/v8.1.4.1
- https://github.com/rails/rails/security/advisories/GHSA-wm3x-v3qw-4jh3
- https://nvd.nist.gov/vuln/detail/CVE-2026-126081
Affected packages
Git / github.com/rails/rails
Affected ranges
- Type
- GIT
- Repo
- https://github.com/rails/rails
- Events
-
IntroducedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "8.1" }, { "fixed": "8.1.4.1" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "introduced": "0" }, { "fixed": "8.0.5.2" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "2fc8838300133931e19eed3ea6cee76a7e83f19c" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "8ba746e0a786458c281060823f2ccc5c5f6312ac" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v8.0.5.2", "range": [ { "fixed": "235c597b100321b6bd2d62f8df63707f42b25b2d" } ], "source": "REFERENCES_TAG" }, { "original_tag": "v8.1.4.1", "range": [ { "fixed": "3f290b759c8e2ffe7c257951b1255740751355e4" } ], "source": "REFERENCES_TAG" } ] }