Vulnerability-Lookup

GHSA-V55J-83PF-R9CQ

Vulnerability from github – Published: 2026-03-23 20:51 – Updated: 2026-05-13 16:14

Summary

Rails has a possible XSS vulnerability in its Action View tag helpers

Details

Impact

When a blank string is used as an HTML attribute name in Action View tag helpers, the attribute escaping is bypassed, producing malformed HTML. A carefully crafted attribute value could then be misinterpreted by the browser as a separate attribute name, possibly leading to XSS. Applications that allow users to specify custom HTML attributes are affected.

Releases

The fixed releases are available at the normal locations.

Credit

This issue was responsibly reported by Hackerone researcher taise.

Severity

2.3 (Low)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "actionview"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.1.0.beta1"
            },
            {
              "fixed": "8.1.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "actionview"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0.beta1"
            },
            {
              "fixed": "8.0.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "actionview"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33168"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-23T20:51:18Z",
    "nvd_published_at": "2026-03-23T23:17:12Z",
    "severity": "LOW"
  },
  "details": "### Impact\nWhen a blank string is used as an HTML attribute name in Action View tag helpers, the attribute escaping is bypassed, producing malformed HTML. A carefully crafted attribute value could then be misinterpreted by the browser as a separate attribute name, possibly leading to XSS. Applications that allow users to specify custom HTML attributes are affected.\n\n### Releases\nThe fixed releases are available at the normal locations.\n\n### Credit\nThis issue was responsibly reported by Hackerone researcher [taise](https://hackerone.com/taise).",
  "id": "GHSA-v55j-83pf-r9cq",
  "modified": "2026-05-13T16:14:53Z",
  "published": "2026-03-23T20:51:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/security/advisories/GHSA-v55j-83pf-r9cq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33168"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/commit/0b6f8002b52b9c606fd6be9e7915d9f944cf539c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/commit/63f5ad83edaa0b976f82d46988d745426aa4a42d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/commit/c79a07df1e88738df8f68cb0ee759ad6128ca924"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rails/rails"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/releases/tag/v7.2.3.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/releases/tag/v8.0.4.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/releases/tag/v8.1.2.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionview/CVE-2026-33168.yml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Rails has a possible XSS vulnerability in its Action View tag helpers"
}

CVE-2026-33168 (GCVE-0-2026-33168)

Vulnerability from cvelistv5 – Published: 2026-03-23 23:01 – Updated: 2026-03-24 13:36

Title

Rails has a possible XSS vulnerability in its Action View tag helpers

Summary

Action View provides conventions and helpers for building web pages with the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when a blank string is used as an HTML attribute name in Action View tag helpers, the attribute escaping is bypassed, producing malformed HTML. A carefully crafted attribute value could then be misinterpreted by the browser as a separate attribute name, possibly leading to XSS. Applications that allow users to specify custom HTML attributes are affected. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Severity

2.3 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-24 13:36 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M mitre root

References

7 references

URL	Tags
https://github.com/rails/rails/security/advisorie…	x_refsource_CONFIRM
https://github.com/rails/rails/commit/0b6f8002b52…	x_refsource_MISC
https://github.com/rails/rails/commit/63f5ad83eda…	x_refsource_MISC
https://github.com/rails/rails/commit/c79a07df1e8…	x_refsource_MISC
https://github.com/rails/rails/releases/tag/v7.2.3.1	x_refsource_MISC
https://github.com/rails/rails/releases/tag/v8.0.4.1	x_refsource_MISC
https://github.com/rails/rails/releases/tag/v8.1.2.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
rails	actionview	Affected: >= 8.1.0.beta1, < 8.1.2.1 Affected: >= 8.0.0.beta1, < 8.0.4.1 Affected: < 7.2.3.1

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JSON

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{
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        "metrics": [
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                "id": "CVE-2026-33168",
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                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-24T13:36:28.555604Z",
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          "lang": "en",
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        }
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      "metrics": [
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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.

Detection rules are retrieved from Rulezet.

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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