Vulnerability-Lookup

CVE-2026-55878 (GCVE-0-2026-55878)

Vulnerability from cvelistv5 – Published: 2026-07-08 21:30 – Updated: 2026-07-09 14:19

Title

Symfony: Path Traversal in symfony/ux-toolkit Allows Arbitrary File Write and Read via Crafted Recipe Manifest

Summary

Symfony UX is a JavaScript ecosystem for Symfony. From 2.32.0 before 2.36.1 and from 3.0.0 before 3.2.0, the ux:install console command installs files from a recipe kit by copying paths listed in a copy-files map, and because Path::isRelative() accepts paths like ../../../etc, a crafted or compromised kit can write attacker-controlled content to arbitrary locations or read local files outside the recipe directory. This issue is fixed in versions 2.36.1 and 3.2.0.

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M

References

4 references

URL	Tags
https://github.com/symfony/ux/security/advisories…	x_refsource_CONFIRM
https://github.com/symfony/ux/commit/7b4ddf3764bf…	x_refsource_MISC
https://github.com/symfony/ux/releases/tag/v2.36.1	x_refsource_MISC
https://github.com/symfony/ux/releases/tag/v3.2.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
symfony	ux	Affected: >= 2.32.0, < 2.36.1 Affected: >= 3.0.0, < 3.2.0

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-55878

Vulnerability from fkie_nvd - Published: 2026-07-08 22:17 - Updated: 2026-07-10 19:10

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/symfony/ux/commit/7b4ddf3764bf269a1b5fde5bf03c4bce568694e4
	security-advisories@github.com	https://github.com/symfony/ux/releases/tag/v2.36.1
	security-advisories@github.com	https://github.com/symfony/ux/releases/tag/v3.2.0
	security-advisories@github.com	https://github.com/symfony/ux/security/advisories/GHSA-p9xj-fpr2-jf2q

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "ux",
          "vendor": "symfony",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.32.0, \u003c 2.36.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c 3.2.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Symfony UX is a JavaScript ecosystem for Symfony. From 2.32.0 before 2.36.1 and from 3.0.0 before 3.2.0, the ux:install console command installs files from a recipe kit by copying paths listed in a copy-files map, and because Path::isRelative() accepts paths like ../../../etc, a crafted or compromised kit can write attacker-controlled content to arbitrary locations or read local files outside the recipe directory. This issue is fixed in versions 2.36.1 and 3.2.0."
    }
  ],
  "id": "CVE-2026-55878",
  "lastModified": "2026-07-10T19:10:59.333",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
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              "exploitation": "none"
            },
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              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-09T14:18:56.012444Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-08T22:17:16.050",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/symfony/ux/commit/7b4ddf3764bf269a1b5fde5bf03c4bce568694e4"
    },
    {
      "source": "security-advisories@github.com",
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    },
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      "url": "https://github.com/symfony/ux/releases/tag/v3.2.0"
    },
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      "url": "https://github.com/symfony/ux/security/advisories/GHSA-p9xj-fpr2-jf2q"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
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          "lang": "en",
          "value": "CWE-22"
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}

GHSA-P9XJ-FPR2-JF2Q

Vulnerability from github – Published: 2026-06-19 21:42 – Updated: 2026-06-19 21:42

Summary

symfony/ux-toolkit: Path Traversal Allows Arbitrary File Write and Read via Crafted Recipe Manifest

Details

Description

The ux:install console command installs files from a recipe kit by copying paths listed in a copy-files map. The only guard against malicious paths was Path::isRelative(), which returns true for paths like ../../../etc. Path::join() then resolves the .. segments without complaint, so the final path can escape the intended directory entirely. A crafted or compromised kit can therefore write attacker-controlled content to arbitrary locations on the developer's machine or CI runner.

Because the copy operation creates missing parent directories and can overwrite existing files silently (with --force or in non-interactive environments), an attacker who controls a kit can overwrite files such as controllers, git hooks, or .env to achieve code execution. The source side of copy-files is symmetrically affected, enabling local file reads outside the recipe directory.

Resolution

The fix introduces an Assert::pathDoesNotEscapeDirectory() helper that rejects any copy-files source or destination path containing a .. segment, regardless of whether / or \ is used as the separator. This check is enforced in both RecipeManifest (which also guards the source Finder) and File. As a last line of defense, the installer re-verifies the fully resolved paths with Path::isBasePath() immediately before each filesystem read and write.

Credits

Symfony would like to thank Pascal Cescon for reporting the issue and Hugo Alliaume for providing the fix.

Severity

7.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/ux-toolkit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.32.0"
            },
            {
              "fixed": "2.36.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/ux-toolkit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55878"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-19T21:42:18Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Description\nThe `ux:install` console command installs files from a recipe kit by copying paths listed in a `copy-files` map. The only guard against malicious paths was `Path::isRelative()`, which returns `true` for paths like `../../../etc`. `Path::join()` then resolves the `..` segments without complaint, so the final path can escape the intended directory entirely. A crafted or compromised kit can therefore write attacker-controlled content   to arbitrary locations on the developer\u0027s machine or CI runner.\n\nBecause the copy operation creates missing parent directories and can overwrite existing files silently (with   `--force` or in non-interactive environments), an attacker who controls a kit can overwrite files such as controllers, git hooks, or `.env` to achieve code execution. The source side of `copy-files` is symmetrically   affected, enabling local file reads outside the recipe directory.\n\n### Resolution\n\nThe fix introduces an `Assert::pathDoesNotEscapeDirectory()` helper that rejects any `copy-files` source or destination path containing a `..` segment, regardless of whether `/` or `\\` is used as the separator. This check is enforced in both `RecipeManifest` (which also guards the source Finder) and `File`. As a last line of defense, the installer re-verifies the fully resolved paths with `Path::isBasePath()` immediately before each filesystem read and write.\n\n### Credits\n\nSymfony would like to thank Pascal Cescon for reporting the issue and Hugo Alliaume for providing the fix.",
  "id": "GHSA-p9xj-fpr2-jf2q",
  "modified": "2026-06-19T21:42:18Z",
  "published": "2026-06-19T21:42:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/symfony/ux/security/advisories/GHSA-p9xj-fpr2-jf2q"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/ux-toolkit/CVE-2026-55878.yaml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/symfony/ux"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "symfony/ux-toolkit: Path Traversal Allows Arbitrary File Write and Read via Crafted Recipe Manifest"
}

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.

Action not permitted

CVE-2026-55878 (GCVE-0-2026-55878)

FKIE_CVE-2026-55878

GHSA-P9XJ-FPR2-JF2Q

Description

Resolution

Credits

Tags

Sightings

Nomenclature