CVE-2026-8727

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 69% 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, nvd
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

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

The Crawler extension passes the X-T3Crawler-Meta response header from crawled URLs directly to PHP's unserialize(). An attacker controlling a crawled endpoint can inject arbitrary serialized PHP objects, leading to Remote Code Execution on the TYPO3 server. Exploitation requires administrative privileges to configure a crawler-enabled page and trigger the crawl via a Scheduler task.

CVSS v3
7.1
EG Score
7.1(medium)
EPSS
31.1%
KEV
Not listed

Published

May 19, 2026

Last Modified

May 19, 2026

Advisory Details (1)

Auto-updated Jun 11, 2026
No patch confirmed yet.
generic

TYPO3-EXT-SA-2026-008: Remote Code Execution in extension "Site Crawler" (crawler) - TYPO3 Project

https://typo3.org/security/advisory/typo3-ext-sa-2026-008

Vendor Advisories for CVE-2026-8727(1)

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
tomasnorre/crawler12.0.0 ... 12.0.9 (11 versions)12.0.11—

Weakness Classification(1)

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

Data Freshness Timeline

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8727?
CVE-2026-8727 is a high vulnerability published on May 19, 2026. The Crawler extension passes the X-T3Crawler-Meta response header from crawled URLs directly to PHP's unserialize(). An attacker controlling a crawled endpoint can inject arbitrary serialized PHP objects, leading to Remote Code Execution on the TYPO3 server. Exploitation requires administrative…
When was CVE-2026-8727 disclosed?
CVE-2026-8727 was first published in the National Vulnerability Database on May 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8727 actively exploited?
CVE-2026-8727 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8727?
CVE-2026-8727 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-8727?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8727, 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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