CVE-2026-19418

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (13th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The referrer enforcement introduced with TYPO3-CORE-SA-2020-006 (CVE-2020-11069) became ineffective in TYPO3 v13.0, where TYPO3 CMS started serving the backend and Install Tool applications from the site's main entry script instead of the dedicated typo3/ directory.

Whether a request originated from the backend or Install Tool itself was determined by comparing the referrer against the directory of the entry script, which since then is the site root. As a consequence, requests originating from any script running on one of the TYPO3 instance's own domains, such as a frontend page, were accepted by backend routes and Install Tool endpoints.

Attackers able to execute JavaScript on one of those domains, for instance by exploiting a cross-site scripting vulnerability, could invoke these endpoints via Fetch/XHR with the privileges of an authenticated victim's user session. This issue affects TYPO3 CMS versions 13.0.0-13.4.33 and 14.0.0-14.3.5.

CVSS v3
7.3
EG Score
7.3HIGHmedium confidence
EG Risk
33
EG Risk 33/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity73% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
13th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 11, 2026

Last Modified

August 26, 2026

Advisory Details (5)

Auto-updated Aug 11, 2026
Patch available. Sources: github_commit.
github_commit

commit 4a75e862c589 (TYPO3/typo3)

Fix landed in TYPO3/typo3 commit 4a75e862c589 — awaiting tagged release

https://github.com/TYPO3/typo3/commit/4a75e862c589c85d795d7c65dcdc835f8f413efc
github_commit

commit a0e8ee06a40e (TYPO3/typo3)

Fix landed in TYPO3/typo3 commit a0e8ee06a40e — awaiting tagged release

https://github.com/TYPO3/typo3/commit/a0e8ee06a40e959b9e7b06a4b1cb19d3a0d3dcf7
github_commit

commit ae0abd329d52 (TYPO3/typo3)

Fix landed in TYPO3/typo3 commit ae0abd329d52 — awaiting tagged release

https://github.com/TYPO3/typo3/commit/ae0abd329d52285fe6e92804c3608820ad45e872
generic

TYPO3-CORE-SA-2020-006: Same-Origin Request Forgery to Backend User Interface - TYPO3 News

https://typo3.org/security/advisory/typo3-core-sa-2020-006
generic

TYPO3-CORE-SA-2026-021: Broken Access Control in Backend and Install Tool - TYPO3 News

https://typo3.org/security/advisory/typo3-core-sa-2026-021

Vendor Advisories for CVE-2026-19418(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 1 ecosystem)
Packagist(2)
PackageVulnerable rangeFix by version rangeDependents
typo3/cms-backendv13.0.0 ... v13.4.9 (41 versions)
  • 13.0.0 up to 13.4.34: fixed in 13.4.34
—
typo3/cms-corev14.0.0 ... v14.3.5 (12 versions)
  • 14.0.0 up to 14.3.6: fixed in 14.3.6
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 137 total refreshes for this CVE.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-03 21:38 UTCEG score recompute
  3. 2026-10-02 22:30 UTCEG score recompute
  4. 2026-10-02 09:14 UTCEG score recompute
  5. 2026-10-01 19:49 UTCEPSS rescore
  6. 2026-09-30 22:22 UTCEG score recompute
  7. 2026-09-30 15:02 UTCEPSS rescore
  8. 2026-09-29 15:20 UTCEPSS rescore
  9. 2026-09-29 05:19 UTCEG score recompute
  10. 2026-09-28 13:51 UTCEPSS rescore
  11. 2026-09-28 02:21 UTCEG score recompute
  12. 2026-09-27 13:47 UTCEPSS rescore
  13. 2026-09-27 11:04 UTCEG score recompute
  14. 2026-09-26 15:58 UTCEPSS rescore
  15. 2026-09-25 03:58 UTCEG score recompute
  16. 2026-09-23 21:08 UTCEG score recompute
  17. 2026-09-22 21:15 UTCEG score recompute
  18. 2026-09-21 21:56 UTCEG score recompute
  19. 2026-09-20 21:24 UTCEG score recompute
  20. 2026-09-19 23:21 UTCEG score recompute
  21. 2026-09-18 22:46 UTCEG score recompute
  22. 2026-09-18 19:27 UTCEPSS rescore
  23. 2026-09-18 00:58 UTCEG score recompute
  24. 2026-09-17 00:39 UTCEG score recompute
  25. 2026-09-16 14:07 UTCEPSS rescore
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  1. 2026-09-16 05:14 UTCEPSS rescore
  2. 2026-09-15 09:42 UTCEG score recompute
  3. 2026-09-13 21:22 UTCEG score recompute
  4. 2026-09-13 16:46 UTCEPSS rescore
  5. 2026-09-12 23:34 UTCEG score recompute
  6. 2026-09-12 15:00 UTCEPSS rescore
  7. 2026-09-12 01:46 UTCEG score recompute
  8. 2026-09-11 14:52 UTCEPSS rescore
  9. 2026-09-11 14:52 UTCEG score recompute
  10. 2026-09-11 09:36 UTCEPSS rescore
  11. 2026-09-10 17:04 UTCEG score recompute
  12. 2026-09-10 09:34 UTCEPSS rescore
  13. 2026-09-09 05:47 UTCEG score recompute
  14. 2026-09-08 22:00 UTCEPSS rescore
  15. 2026-09-07 17:07 UTCEG score recompute
  16. 2026-09-07 16:01 UTCEPSS rescore
  17. 2026-09-06 22:14 UTCEG score recompute
  18. 2026-09-06 13:47 UTCEPSS rescore
  19. 2026-09-06 00:24 UTCEG score recompute
  20. 2026-09-04 14:35 UTCEG score recompute
  21. 2026-09-04 05:06 UTCEPSS rescore
  22. 2026-09-03 01:57 UTCEG score recompute
  23. 2026-09-02 14:11 UTCEPSS rescore
  24. 2026-09-02 00:44 UTCEG score recompute
  25. 2026-09-01 13:53 UTCEPSS rescore
  26. 2026-09-01 13:31 UTCGHSA enrichment
  27. 2026-08-31 22:00 UTCGHSA enrichment
  28. 2026-08-31 05:35 UTCEG score recompute
  29. 2026-08-31 05:35 UTCGHSA enrichment
  30. 2026-08-30 19:17 UTCEPSS rescore
  31. 2026-08-30 18:41 UTCGHSA enrichment
  32. 2026-08-30 07:47 UTCEG score recompute
  33. 2026-08-30 07:46 UTCGHSA enrichment
  34. 2026-08-30 01:22 UTCEPSS rescore
  35. 2026-08-29 20:52 UTCGHSA enrichment
  36. 2026-08-29 09:48 UTCEG score recompute
  37. 2026-08-29 09:47 UTCGHSA enrichment
  38. 2026-08-28 21:41 UTCEPSS rescore
  39. 2026-08-28 03:33 UTCGHSA enrichment
  40. 2026-08-27 16:40 UTCEG score recompute
  41. 2026-08-27 16:40 UTCGHSA enrichment
  42. 2026-08-27 14:25 UTCEPSS rescore
  43. 2026-08-27 04:35 UTCGHSA enrichment
  44. 2026-08-26 17:27 UTCGHSA enrichment
  45. 2026-08-26 15:10 UTCEG score recompute
  46. 2026-08-26 15:10 UTCGHSA enrichment
  47. 2026-08-26 14:46 UTCEPSS rescore
  48. 2026-08-26 04:16 UTCGHSA enrichment
  49. 2026-08-25 17:15 UTCEG score recompute
  50. 2026-08-25 17:15 UTCGHSA enrichment
  51. 2026-08-25 13:48 UTCEPSS rescore
  52. 2026-08-25 06:01 UTCGHSA enrichment
  53. 2026-08-24 19:07 UTCEG score recompute
  54. 2026-08-24 19:07 UTCGHSA enrichment
  55. 2026-08-24 08:10 UTCGHSA enrichment
  56. 2026-08-23 21:16 UTCGHSA enrichment
  57. 2026-08-23 10:22 UTCEG score recompute
  58. 2026-08-23 10:22 UTCGHSA enrichment
  59. 2026-08-23 00:19 UTCEPSS rescore
  60. 2026-08-22 23:18 UTCGHSA enrichment
  61. 2026-08-22 12:24 UTCGHSA enrichment
  62. 2026-08-22 01:29 UTCEG score recompute
  63. 2026-08-22 01:29 UTCGHSA enrichment
  64. 2026-08-21 23:49 UTCEPSS rescore
  65. 2026-08-21 14:36 UTCGHSA enrichment
  66. 2026-08-21 03:42 UTCEG score recompute
  67. 2026-08-21 03:42 UTCGHSA enrichment
  68. 2026-08-20 22:55 UTCEPSS rescore
  69. 2026-08-20 16:48 UTCGHSA enrichment
  70. 2026-08-20 05:36 UTCGHSA enrichment
  71. 2026-08-19 18:42 UTCEG score recompute
  72. 2026-08-19 18:42 UTCGHSA enrichment
  73. 2026-08-19 17:03 UTCEPSS rescore
  74. 2026-08-19 07:41 UTCGHSA enrichment
  75. 2026-08-18 20:47 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-19418?
CVE-2026-19418 is a high vulnerability published on August 11, 2026. The referrer enforcement introduced with TYPO3-CORE-SA-2020-006 (CVE-2020-11069) became ineffective in TYPO3 v13.0, where TYPO3 CMS started serving the backend and Install Tool applications from the site's main entry script instead of the dedicated typo3/ directory. Whether a request originated…
When was CVE-2026-19418 disclosed?
CVE-2026-19418 was first published on August 11, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19418 actively exploited?
CVE-2026-19418 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-19418?
CVE-2026-19418 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-19418?
A fix for CVE-2026-19418 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-19418 are linked in the Vendor Advisories panel on this page.

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