Vulnerability-Lookup

GHSA-68P9-83H6-5WPJ

Vulnerability from github – Published: 2026-11-12 22:08 – Updated: 2026-11-12 22:08

Summary

Action View: Possible XSS vulnerability in tag helpers

Details

Impact

The fix for CVE-2026-33168 skips blank HTML attribute names in Action View tag helpers, but it tests the name before converting it to a string. A Symbol name made only of whitespace, such as :" ", is not blank, because Symbol#blank? is Symbol#empty?, so it reaches the attribute escaping, which emits an attribute with no name and produces malformed HTML. The asset tag helpers, such as image_tag, video_tag and audio_tag, symbolize their options, so a whitespace String name passed to them takes the same path. 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 attribute names are affected.

Releases

The fixed releases are available at the normal locations.

Patches for those who cannot upgrade at once: - 8.1: https://github.com/rails/rails/commit/9190210606ffe52f92fdc75637f8ff69404f22c8.patch - 8.0: https://github.com/rails/rails/commit/f47452533e1f28d847c63181b9d5f8b7243ef9a4.patch

Credit

This issue was responsibly reported by HackerOne researcher thepo1es.

Severity

4.7 (Medium)


                  
                    CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "actionview"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.1.0.beta1"
            },
            {
              "fixed": "8.1.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "actionview"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.0.5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-126069"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-11-12T22:08:21Z",
    "nvd_published_at": "2026-11-10T21:19:24Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\nThe fix for [CVE-2026-33168](https://github.com/rails/rails/security/advisories/GHSA-v55j-83pf-r9cq) skips blank HTML attribute names in Action View tag helpers, but it tests the name before converting it to a string. A Symbol name made only of whitespace, such as `:\" \"`, is not blank, because `Symbol#blank?` is `Symbol#empty?`, so it reaches the attribute escaping, which emits an attribute with no name and produces malformed HTML. The asset tag helpers, such as `image_tag`, `video_tag` and `audio_tag`, symbolize their options, so a whitespace String name passed to them takes the same path. 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 attribute names are affected.\n\n### Releases\nThe fixed releases are available at the normal locations.\n\nPatches for those who cannot upgrade at once:\n- 8.1: https://github.com/rails/rails/commit/9190210606ffe52f92fdc75637f8ff69404f22c8.patch\n- 8.0: https://github.com/rails/rails/commit/f47452533e1f28d847c63181b9d5f8b7243ef9a4.patch\n\n### Credit\nThis issue was responsibly reported by HackerOne researcher [thepo1es](https://hackerone.com/thepo1es).",
  "id": "GHSA-68p9-83h6-5wpj",
  "modified": "2026-11-12T22:08:21Z",
  "published": "2026-11-12T22:08:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/security/advisories/GHSA-68p9-83h6-5wpj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126069"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/commit/9190210606ffe52f92fdc75637f8ff69404f22c8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/commit/f47452533e1f28d847c63181b9d5f8b7243ef9a4"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rails/rails"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/releases/tag/v8.0.5.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/releases/tag/v8.1.4.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionview/GHSA-68p9-83h6-5wpj.yml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Action View: Possible XSS vulnerability in tag helpers"
}

CVE-2026-126069 (GCVE-0-2026-126069)

Vulnerability from cvelistv5 – Published: 2026-11-10 20:36 – Updated: 2026-11-10 20:36

Title

Action View: Possible XSS vulnerability in Action View tag helpers

Summary

Action View is a framework for handling view template lookup and rendering and provides view helpers for building HTML. Prior to 8.1.4.1 and 8.0.5.2, the fix for CVE-2026-33168 skips blank HTML attribute names in Action View tag helpers, but it tests the name before converting it to a string. A Symbol name made only of whitespace, such as :" ", is not blank, because Symbol#blank? is Symbol#empty?, so it reaches the attribute escaping, which emits an attribute with no name and produces malformed HTML. The asset tag helpers, such as image_tag, video_tag and audio_tag, symbolize their options, so a whitespace String name passed to them takes the same path. 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 attribute names are affected. This issue is fixed in versions 8.1.4.1 and 8.0.5.2.

Severity

4.7 (Medium)


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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7820 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/rails/rails/security/advisorie…	x_refsource_CONFIRM
https://github.com/rails/rails/commit/9190210606f…	x_refsource_MISC
https://github.com/rails/rails/commit/f47452533e1…	x_refsource_MISC
https://github.com/rails/rails/releases/tag/v8.0.5.2	x_refsource_MISC
https://github.com/rails/rails/releases/tag/v8.1.4.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
rails	rails	Affected: >= 8.1, < 8.1.4.1 Affected: < 8.0.5.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "rails",
          "vendor": "rails",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 8.1, \u003c 8.1.4.1"
            },
            {
              "status": "affected",
              "version": "\u003c 8.0.5.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Action View is a framework for handling view template lookup and rendering and provides view helpers for building HTML. Prior to 8.1.4.1 and 8.0.5.2, the fix for CVE-2026-33168 skips blank HTML attribute names in Action View tag helpers, but it tests the name before converting it to a string. A Symbol name made only of whitespace, such as :\" \", is not blank, because Symbol#blank? is Symbol#empty?, so it reaches the attribute escaping, which emits an attribute with no name and produces malformed HTML. The asset tag helpers, such as image_tag, video_tag and audio_tag, symbolize their options, so a whitespace String name passed to them takes the same path. 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 attribute names are affected. This issue is fixed in versions 8.1.4.1 and 8.0.5.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-10T20:36:59.705Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/rails/rails/security/advisories/GHSA-68p9-83h6-5wpj",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/rails/rails/security/advisories/GHSA-68p9-83h6-5wpj"
        },
        {
          "name": "https://github.com/rails/rails/commit/9190210606ffe52f92fdc75637f8ff69404f22c8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/rails/rails/commit/9190210606ffe52f92fdc75637f8ff69404f22c8"
        },
        {
          "name": "https://github.com/rails/rails/commit/f47452533e1f28d847c63181b9d5f8b7243ef9a4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/rails/rails/commit/f47452533e1f28d847c63181b9d5f8b7243ef9a4"
        },
        {
          "name": "https://github.com/rails/rails/releases/tag/v8.0.5.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/rails/rails/releases/tag/v8.0.5.2"
        },
        {
          "name": "https://github.com/rails/rails/releases/tag/v8.1.4.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/rails/rails/releases/tag/v8.1.4.1"
        }
      ],
      "source": {
        "advisory": "GHSA-68p9-83h6-5wpj",
        "discovery": "UNKNOWN"
      },
      "title": "Action View: Possible XSS vulnerability in Action View tag helpers"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-126069",
    "datePublished": "2026-11-10T20:36:59.705Z",
    "dateReserved": "2026-11-10T17:07:43.283Z",
    "dateUpdated": "2026-11-10T20:36:59.705Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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