Directory Traversal in typo3/phar-stream-wrapper

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

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

EPSS

• CVE-2019-11831: 5.44% estimated exploitation activity in the next 30 days; percentile 92.73 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

The PharStreamWrapper (aka phar-stream-wrapper) package 2.x before 2.1.1 and 3.x before 3.1.1 for TYPO3 does not prevent directory traversal, which allows attackers to bypass a deserialization protection mechanism, as demonstrated by a phar:///path/bad.phar/../good.phar URL.

Published by the source

30 Sep 2021, 17:10 UTC

Last modified by the source

6 Feb 2024, 11:55 UTC

Source last checked

26 Oct 2026, 14:15 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-xv7v-rf6g-xwrc

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# Patch Next advisory brief: CVE-2019-11831

Advisory: Directory Traversal in typo3/phar-stream-wrapper
IDs: CVE-2019-11831, GHSA-xv7v-rf6g-xwrc
Record: https://patchnext.com/advisories/cve-2019-11831 (revision 1, source checked 26 Oct 2026, 14:15 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: typo3/phar-stream-wrapper 3.1.1, 2.1.1; drupal/core 8.7.1, 8.6.16, 7.67.0; drupal/drupal 8.7.1, 8.6.16, 7.67.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist typo3/phar-stream-wrapper: affected >= 2.0.0, < 2.1.1; >= 3.0.0, < 3.1.1; fixed in 3.1.1, 2.1.1
- Packagist drupal/core: affected >= 7.0.0, < 7.67.0; >= 8.0.0, < 8.6.16; >= 8.7.0, < 8.7.1; fixed in 7.67.0, 8.6.16, 8.7.1
- Packagist drupal/drupal: affected >= 7.0.0, < 7.67.0; >= 8.0.0, < 8.6.16; >= 8.7.0, < 8.7.1; fixed in 7.67.0, 8.6.16, 8.7.1

## Suggested inspection (read-only)
- Packagist typo3/phar-stream-wrapper: check the installed version with your package manager.
- Packagist drupal/core: check the installed version with your package manager.
- Packagist drupal/drupal: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on typo3/phar-stream-wrapper, drupal/core, drupal/drupal.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-xv7v-rf6g-xwrc (GitHub-reviewed advisory GHSA-xv7v-rf6g-xwrc lists affected ranges: Packagist typo3/phar-stream-wrapper >=2.0.0 =3.0.0 =7.0.0 =8.0.0 =8.7.0 =7.0.0 =8.0.0 =8.7.0 <8.7.1)

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