Vulnerability-Lookup

GHSA-GG4P-9C93-5HFP

Vulnerability from github – Published: 2026-10-24 00:32 – Updated: 2026-10-24 00:32

Details

The vulnerable condition value is ultimately cast to an integer. That does not protect the secret: the template can return author ID 1 when a guessed key character is correct and an impossible ID otherwise. The JSON endpoint returns entries for the first case and an empty array for the second, forming a stable remote character oracle.

After recovering GeneralConfig::securityKey, the same user can compute Craft’s generic HMAC wire format offline. Signed parameters such as redirect are then accepted and passed to unsandboxed View::renderObjectTemplate(), where Twig’s string-callable form can invoke native PHP callables. The regression proof uses the harmless substr() callback and observes abcdef becoming cdef; it does not execute an OS command.

Severity

8.8 (High)


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

8.7 (High)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-115938"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1336"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T22:16:59Z",
    "severity": "HIGH"
  },
  "details": "Craft CMS allows any authenticated control panel user to submit an element-search condition whose element selector is evaluated as a sandboxed Twig object template. Craft\u2019s allowed\u00a0column\u00a0filter delegates property lookup to Yii\u00a0ArrayHelper, outside Twig\u2019s\u00a0SecurityPolicy. Repeated single-segment lookups therefore bypass the sandbox\u2019s empty property/method allowlists.\n\n\n\nThe vulnerable condition value is ultimately cast to an integer. That does not protect the secret: the template can return author ID\u00a01\u00a0when a guessed key character is correct and an impossible ID otherwise. The JSON endpoint returns entries for the first case and an empty array for the second, forming a stable remote character oracle.\n\n\n\nAfter recovering\u00a0GeneralConfig::securityKey, the same user can compute Craft\u2019s generic HMAC wire format offline. Signed parameters such as\u00a0redirect\u00a0are then accepted and passed to unsandboxed\u00a0View::renderObjectTemplate(), where Twig\u2019s string-callable form can invoke native PHP callables. The regression proof uses the harmless\u00a0substr()\u00a0callback and observes\u00a0abcdef\u00a0becoming\u00a0cdef; it does not execute an OS command.",
  "id": "GHSA-gg4p-9c93-5hfp",
  "modified": "2026-10-24T00:32:35Z",
  "published": "2026-10-24T00:32:35Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-v4q3-2g5g-wjj6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115938"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/5.11.2"
    },
    {
      "type": "WEB",
      "url": "https://www.hckrt.com/hacktivity/HCKRT-DRNL9W"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-115938 (GCVE-0-2026-115938)

Vulnerability from cvelistv5 – Published: 2026-10-23 21:58 – Updated: 2026-10-23 21:58

Title

Low privilege condition filter escapes Twig sandbox, recovers "securityKey" and reaches RCE

Summary

Craft CMS allows any authenticated control panel user to submit an element-search condition whose element selector is evaluated as a sandboxed Twig object template. Craft’s allowed column filter delegates property lookup to Yii ArrayHelper, outside Twig’s SecurityPolicy. Repeated single-segment lookups therefore bypass the sandbox’s empty property/method allowlists. The vulnerable condition value is ultimately cast to an integer. That does not protect the secret: the template can return author ID 1 when a guessed key character is correct and an impossible ID otherwise. The JSON endpoint returns entries for the first case and an empty array for the second, forming a stable remote character oracle. After recovering GeneralConfig::securityKey, the same user can compute Craft’s generic HMAC wire format offline. Signed parameters such as redirect are then accepted and passed to unsandboxed View::renderObjectTemplate(), where Twig’s string-callable form can invoke native PHP callables. The regression proof uses the harmless substr() callback and observes abcdef becoming cdef; it does not execute an OS command.

Severity

8.7 (High)


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

8.8 (High)


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

CWE

CWE-1336 - Improper neutralization of special elements used in a template engine

Assigner

Hackrate CNA under the icscert root

CNA scorecard B 87/100 over 10 records in the last 180 days details

References

4 references

URL	Tags
https://www.hckrt.com/hacktivity/HCKRT-DRNL9W	third-party-advisorytechnical-descriptionmitigation
https://github.com/craftcms/cms/releases/tag/5.11.2	release-notes
https://github.com/craftcms/cms	product
https://github.com/craftcms/cms/security/advisori…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
craftcms	cms	Affected: 5.0.0 , < 5.11.2 (semver) Affected: 4.0.0 , < 4.18.9 (semver) cpe:2.3:a:craftcms:cms:::::::: cpe:2.3:a:craftcms:cms::::::::

Credits

Mohamed Wagdy (@Kalawy) Hackrate

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://packagist.org",
          "defaultStatus": "unaffected",
          "packageName": "craftcms/cms",
          "product": "cms",
          "vendor": "craftcms",
          "versions": [
            {
              "lessThan": "5.11.2",
              "status": "affected",
              "version": "5.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "4.18.9",
              "status": "affected",
              "version": "4.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:craftcms:cms:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.11.2",
                  "versionStartIncluding": "5.0.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:a:craftcms:cms:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.18.9",
                  "versionStartIncluding": "4.0.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "OR"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Mohamed Wagdy (@Kalawy)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Hackrate"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eCraft CMS allows any authenticated control panel user to submit an element-search condition whose element selector is evaluated as a sandboxed Twig object template. Craft\u2019s allowed\u0026nbsp;\u003ccode\u003ecolumn\u003c/code\u003e\u0026nbsp;filter delegates property lookup to Yii\u0026nbsp;\u003ccode\u003eArrayHelper\u003c/code\u003e, outside Twig\u2019s\u0026nbsp;\u003ccode\u003eSecurityPolicy\u003c/code\u003e. Repeated single-segment lookups therefore bypass the sandbox\u2019s empty property/method allowlists.\u003c/p\u003e\u003cp\u003eThe vulnerable condition value is ultimately cast to an integer. That does not protect the secret: the template can return author ID\u0026nbsp;\u003ccode\u003e1\u003c/code\u003e\u0026nbsp;when a guessed key character is correct and an impossible ID otherwise. The JSON endpoint returns entries for the first case and an empty array for the second, forming a stable remote character oracle.\u003c/p\u003e\u003cp\u003eAfter recovering\u0026nbsp;\u003ccode\u003eGeneralConfig::securityKey\u003c/code\u003e, the same user can compute Craft\u2019s generic HMAC wire format offline. Signed parameters such as\u0026nbsp;\u003ccode\u003eredirect\u003c/code\u003e\u0026nbsp;are then accepted and passed to unsandboxed\u0026nbsp;\u003ccode\u003eView::renderObjectTemplate()\u003c/code\u003e, where Twig\u2019s string-callable form can invoke native PHP callables. The regression proof uses the harmless\u0026nbsp;\u003ccode\u003esubstr()\u003c/code\u003e\u0026nbsp;callback and observes\u0026nbsp;\u003ccode\u003eabcdef\u003c/code\u003e\u0026nbsp;becoming\u0026nbsp;\u003ccode\u003ecdef\u003c/code\u003e; it does not execute an OS command.\u003c/p\u003e"
            }
          ],
          "value": "Craft CMS allows any authenticated control panel user to submit an element-search condition whose element selector is evaluated as a sandboxed Twig object template. Craft\u2019s allowed\u00a0column\u00a0filter delegates property lookup to Yii\u00a0ArrayHelper, outside Twig\u2019s\u00a0SecurityPolicy. Repeated single-segment lookups therefore bypass the sandbox\u2019s empty property/method allowlists.\n\n\n\nThe vulnerable condition value is ultimately cast to an integer. That does not protect the secret: the template can return author ID\u00a01\u00a0when a guessed key character is correct and an impossible ID otherwise. The JSON endpoint returns entries for the first case and an empty array for the second, forming a stable remote character oracle.\n\n\n\nAfter recovering\u00a0GeneralConfig::securityKey, the same user can compute Craft\u2019s generic HMAC wire format offline. Signed parameters such as\u00a0redirect\u00a0are then accepted and passed to unsandboxed\u00a0View::renderObjectTemplate(), where Twig\u2019s string-callable form can invoke native PHP callables. The regression proof uses the harmless\u00a0substr()\u00a0callback and observes\u00a0abcdef\u00a0becoming\u00a0cdef; it does not execute an OS command."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
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          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1336",
              "description": "CWE-1336 Improper neutralization of special elements used in a template engine",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T21:58:51.816Z",
        "orgId": "7004884b-51e2-48e8-b4a2-5ca29e80453e",
        "shortName": "Hackrate"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory",
            "technical-description",
            "mitigation"
          ],
          "url": "https://www.hckrt.com/hacktivity/HCKRT-DRNL9W"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/craftcms/cms/releases/tag/5.11.2"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/craftcms/cms"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://github.com/craftcms/cms/security/advisories/GHSA-v4q3-2g5g-wjj6"
        }
      ],
      "source": {
        "advisory": "GHSA-v4q3-2g5g-wjj6",
        "discovery": "UNKNOWN"
      },
      "title": "Low privilege condition filter escapes Twig sandbox, recovers \"securityKey\" and reaches RCE",
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "7004884b-51e2-48e8-b4a2-5ca29e80453e",
    "assignerShortName": "Hackrate",
    "cveId": "CVE-2026-115938",
    "datePublished": "2026-10-23T21:58:51.816Z",
    "dateReserved": "2026-10-23T21:25:32.945Z",
    "dateUpdated": "2026-10-23T21:58:51.816Z",
    "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.

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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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