TYPO3 CMS vulnerable to Denial of Service in Page Error Handling

Exploitation

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

CVSS

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

EPSS

• CVE-2022-36104: 1.61% estimated exploitation activity in the next 30 days; percentile 76.00 (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.

Meta CVSS: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:F/RL:O/RC:C (5.5) Problem Requesting invalid or non-existing resources via HTTP triggers the page error handler which again could retrieve content to be shown as an error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. This vulnerability is the same as described in TYPO3-CORE-SA-2021-005 (CVE-2021-21359). A regression, introduced during TYPO3 v11 development, led to this situation. Solution Update to TYPO3 version 11.5.16 that fixes the problem described above. Credits Thanks to Rik Willems who reported this issue and to TYPO3 core & security team member Oliver Hader who fixed the issue. References TYPO3-CORE-SA-2022-006

Published by the source

16 Sep 2022, 17:16 UTC

Last modified by the source

27 Jan 2023, 05:02 UTC

Source last checked

26 Oct 2026, 13:59 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-fffr-7x4x-f98q

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# Patch Next advisory brief: CVE-2022-36104

Advisory: TYPO3 CMS vulnerable to Denial of Service in Page Error Handling
IDs: CVE-2022-36104, GHSA-fffr-7x4x-f98q
Record: https://patchnext.com/advisories/cve-2022-36104 (revision 1, source checked 26 Oct 2026, 13:59 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: typo3/cms-core 11.5.16; typo3/cms 11.5.16. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist typo3/cms-core: affected >= 11.4.0, < 11.5.16; fixed in 11.5.16
- Packagist typo3/cms: affected >= 11.4.0, < 11.5.16; fixed in 11.5.16

## Suggested inspection (read-only)
- Packagist typo3/cms-core: check the installed version with your package manager.
- Packagist typo3/cms: 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/cms-core, typo3/cms.
- 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-fffr-7x4x-f98q (GitHub-reviewed advisory GHSA-fffr-7x4x-f98q lists affected ranges: Packagist typo3/cms-core >=11.4.0 =11.4.0 <11.5.16)

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