Vulnerability-Lookup

UBUNTU-CVE-2026-46636 (CVE-2026-46636)

Vulnerability from osv_ubuntu – Published: 2026-09-04 22:17 – Updated: 2026-09-16 11:35 – Source website

Details

Twig is a template language for PHP. From version 1.0.0 to before version 3.27.0, SecurityPolicy::checkMethodAllowed() unconditionally whitelists all method calls on instances of Twig\Markup. Twig\Markup is not final, so subclasses inherit the bypass. An application that passes an object of a Markup-derived class into a sandboxed template (typically to mark a chunk of HTML as safe) inadvertently exposes every public method of that subclass to template authors, regardless of the configured allowedMethods list. This issue has been patched in version 3.27.0.

Severity

8.7 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-46636	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-46636	REPORT
	https://symfony.com/blog/cve-2026-46636-sandbox-f…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-twig",
            "binary_version": "2.12.5-1ubuntu0.1~esm2"
          },
          {
            "binary_name": "php-twig-cssinliner-extra",
            "binary_version": "2.12.5-1ubuntu0.1~esm2"
          },
          {
            "binary_name": "php-twig-extra-bundle",
            "binary_version": "2.12.5-1ubuntu0.1~esm2"
          },
          {
            "binary_name": "php-twig-html-extra",
            "binary_version": "2.12.5-1ubuntu0.1~esm2"
          },
          {
            "binary_name": "php-twig-inky-extra",
            "binary_version": "2.12.5-1ubuntu0.1~esm2"
          },
          {
            "binary_name": "php-twig-intl-extra",
            "binary_version": "2.12.5-1ubuntu0.1~esm2"
          },
          {
            "binary_name": "php-twig-markdown-extra",
            "binary_version": "2.12.5-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "php-twig",
        "purl": "pkg:deb/ubuntu/php-twig@2.12.5-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.11.3-2",
        "2.12.1-1",
        "2.12.2-1",
        "2.12.3-1",
        "2.12.5-1",
        "2.12.5-1ubuntu0.1~esm1",
        "2.12.5-1ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-twig",
            "binary_version": "3.3.8-2ubuntu4+esm2"
          },
          {
            "binary_name": "php-twig-cache-extra",
            "binary_version": "3.3.8-2ubuntu4+esm2"
          },
          {
            "binary_name": "php-twig-cssinliner-extra",
            "binary_version": "3.3.8-2ubuntu4+esm2"
          },
          {
            "binary_name": "php-twig-extra-bundle",
            "binary_version": "3.3.8-2ubuntu4+esm2"
          },
          {
            "binary_name": "php-twig-html-extra",
            "binary_version": "3.3.8-2ubuntu4+esm2"
          },
          {
            "binary_name": "php-twig-inky-extra",
            "binary_version": "3.3.8-2ubuntu4+esm2"
          },
          {
            "binary_name": "php-twig-intl-extra",
            "binary_version": "3.3.8-2ubuntu4+esm2"
          },
          {
            "binary_name": "php-twig-markdown-extra",
            "binary_version": "3.3.8-2ubuntu4+esm2"
          },
          {
            "binary_name": "php-twig-string-extra",
            "binary_version": "3.3.8-2ubuntu4+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "php-twig",
        "purl": "pkg:deb/ubuntu/php-twig@3.3.8-2ubuntu4+esm2?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3.2-1ubuntu3",
        "3.3.4-1",
        "3.3.6-1",
        "3.3.7-1",
        "3.3.8-2ubuntu4",
        "3.3.8-2ubuntu4+esm1",
        "3.3.8-2ubuntu4+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-twig",
            "binary_version": "3.8.0-2ubuntu1+esm1"
          },
          {
            "binary_name": "php-twig-cache-extra",
            "binary_version": "3.8.0-2ubuntu1+esm1"
          },
          {
            "binary_name": "php-twig-cssinliner-extra",
            "binary_version": "3.8.0-2ubuntu1+esm1"
          },
          {
            "binary_name": "php-twig-extra-bundle",
            "binary_version": "3.8.0-2ubuntu1+esm1"
          },
          {
            "binary_name": "php-twig-html-extra",
            "binary_version": "3.8.0-2ubuntu1+esm1"
          },
          {
            "binary_name": "php-twig-inky-extra",
            "binary_version": "3.8.0-2ubuntu1+esm1"
          },
          {
            "binary_name": "php-twig-intl-extra",
            "binary_version": "3.8.0-2ubuntu1+esm1"
          },
          {
            "binary_name": "php-twig-markdown-extra",
            "binary_version": "3.8.0-2ubuntu1+esm1"
          },
          {
            "binary_name": "php-twig-string-extra",
            "binary_version": "3.8.0-2ubuntu1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "php-twig",
        "purl": "pkg:deb/ubuntu/php-twig@3.8.0-2ubuntu1+esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.7.0-1",
        "3.7.1-1",
        "3.8.0-2",
        "3.8.0-2ubuntu0.1~esm1",
        "3.8.0-2ubuntu1",
        "3.8.0-2ubuntu1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-twig",
            "binary_version": "3.20.0-2ubuntu1"
          },
          {
            "binary_name": "php-twig-cache-extra",
            "binary_version": "3.20.0-2ubuntu1"
          },
          {
            "binary_name": "php-twig-cssinliner-extra",
            "binary_version": "3.20.0-2ubuntu1"
          },
          {
            "binary_name": "php-twig-extra-bundle",
            "binary_version": "3.20.0-2ubuntu1"
          },
          {
            "binary_name": "php-twig-html-extra",
            "binary_version": "3.20.0-2ubuntu1"
          },
          {
            "binary_name": "php-twig-inky-extra",
            "binary_version": "3.20.0-2ubuntu1"
          },
          {
            "binary_name": "php-twig-intl-extra",
            "binary_version": "3.20.0-2ubuntu1"
          },
          {
            "binary_name": "php-twig-markdown-extra",
            "binary_version": "3.20.0-2ubuntu1"
          },
          {
            "binary_name": "php-twig-string-extra",
            "binary_version": "3.20.0-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "php-twig",
        "purl": "pkg:deb/ubuntu/php-twig@3.20.0-2ubuntu1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.20.0-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "php-twig",
            "binary_version": "3.23.0-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "php-twig-cache-extra",
            "binary_version": "3.23.0-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "php-twig-cssinliner-extra",
            "binary_version": "3.23.0-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "php-twig-extra-bundle",
            "binary_version": "3.23.0-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "php-twig-html-extra",
            "binary_version": "3.23.0-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "php-twig-inky-extra",
            "binary_version": "3.23.0-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "php-twig-intl-extra",
            "binary_version": "3.23.0-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "php-twig-markdown-extra",
            "binary_version": "3.23.0-2ubuntu0.1~esm1"
          },
          {
            "binary_name": "php-twig-string-extra",
            "binary_version": "3.23.0-2ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "php-twig",
        "purl": "pkg:deb/ubuntu/php-twig@3.23.0-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.20.0-2ubuntu1",
        "3.23.0-2build5",
        "3.23.0-2build7",
        "3.23.0-2ubuntu0.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "Twig is a template language for PHP. From version 1.0.0 to before version 3.27.0, SecurityPolicy::checkMethodAllowed() unconditionally whitelists all method calls on instances of Twig\\Markup. Twig\\Markup is not final, so subclasses inherit the bypass. An application that passes an object of a Markup-derived class into a sandboxed template (typically to mark a chunk of HTML as safe) inadvertently exposes every public method of that subclass to template authors, regardless of the configured allowedMethods list. This issue has been patched in version 3.27.0.",
  "id": "UBUNTU-CVE-2026-46636",
  "modified": "2026-09-16T11:35:31Z",
  "published": "2026-09-04T22:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-46636"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-46636"
    },
    {
      "type": "REPORT",
      "url": "https://symfony.com/blog/cve-2026-46636-sandbox-filter-tag-and-function-allow-list-bypass-when-sandbox-state-changes-between-renders"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-46636"
  ]
}

CVE-2026-46636 (GCVE-0-2026-46636)

Vulnerability from cvelistv5 – Published: 2026-09-04 22:07 – Updated: 2026-09-08 17:38

Title

Twig: Sandbox method allowlist bypass via `Markup` subclass

Summary

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 17:37 UTC

CWE

CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/twigphp/Twig/security/advisori…	x_refsource_CONFIRM
https://security-tracker.debian.org/tracker/CVE-2…	x_refsource_MISC
https://security-tracker.debian.org/tracker/DSA-6311-1	x_refsource_MISC
https://symfony.com/blog/cve-2026-46636-sandbox-f…	x_refsource_MISC
http://github.com/twigphp/Twig/releases/tag/v3.27.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
twigphp	Twig	Affected: >= 1.0.0, < 3.27.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-46636",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T17:37:04.193009Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-08T17:38:45.651Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Twig",
          "vendor": "twigphp",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0.0, \u003c 3.27.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Twig is a template language for PHP. From version 1.0.0 to before version 3.27.0, SecurityPolicy::checkMethodAllowed() unconditionally whitelists all method calls on instances of Twig\\Markup. Twig\\Markup is not final, so subclasses inherit the bypass. An application that passes an object of a Markup-derived class into a sandboxed template (typically to mark a chunk of HTML as safe) inadvertently exposes every public method of that subclass to template authors, regardless of the configured allowedMethods list. This issue has been patched in version 3.27.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1336",
              "description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T22:07:35.122Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/twigphp/Twig/security/advisories/GHSA-64jr-qjx4-w2fh",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/twigphp/Twig/security/advisories/GHSA-64jr-qjx4-w2fh"
        },
        {
          "name": "https://security-tracker.debian.org/tracker/CVE-2026-46636",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://security-tracker.debian.org/tracker/CVE-2026-46636"
        },
        {
          "name": "https://security-tracker.debian.org/tracker/DSA-6311-1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://security-tracker.debian.org/tracker/DSA-6311-1"
        },
        {
          "name": "https://symfony.com/blog/cve-2026-46636-sandbox-filter-tag-and-function-allow-list-bypass-when-sandbox-state-changes-between-renders",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://symfony.com/blog/cve-2026-46636-sandbox-filter-tag-and-function-allow-list-bypass-when-sandbox-state-changes-between-renders"
        },
        {
          "name": "http://github.com/twigphp/Twig/releases/tag/v3.27.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://github.com/twigphp/Twig/releases/tag/v3.27.0"
        }
      ],
      "source": {
        "advisory": "GHSA-64jr-qjx4-w2fh",
        "discovery": "UNKNOWN"
      },
      "title": "Twig: Sandbox method allowlist bypass via `Markup` subclass"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-46636",
    "datePublished": "2026-09-04T22:07:35.122Z",
    "dateReserved": "2026-05-15T20:11:54.584Z",
    "dateUpdated": "2026-09-08T17:38:45.651Z",
    "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.

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.
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.