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%, top 88% of all CVEs by exploit prediction. 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%CVSS: 7.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
7.3(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 26, 2026

Advisory Details (5)

Auto-updated Aug 11, 2026
Upstream fix merged — awaiting tagged release. 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 rangeFixed inDependents
typo3/cms-backendv13.0.0 ... v13.4.9 (41 versions)13.4.34—
typo3/cms-corev14.0.0 ... v14.3.5 (12 versions)14.3.6—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 74× 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 117 total refreshes for this CVE.

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

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 88.1% of all scored CVEs.
What is the CVSS score of CVE-2026-19418?
CVE-2026-19418 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-19418?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19418, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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