CVE-2026-34415

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-22. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Weaponized
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 9.8Exploit: NoneExposed: 0

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

Xerte Online Toolkits versions 3.15 and earlier contain an incomplete input validation vulnerability in the elFinder connector endpoint that fails to block PHP-executable extensions .php4 due to an incorrect regex pattern. Unauthenticated attackers can exploit this flaw combined with authentication bypass and path traversal vulnerabilities to upload malicious PHP code, rename it with a .php4 extension, and execute arbitrary operating system commands on the server.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
88.0%
KEV
Not listed

Published

April 22, 2026

Last Modified

May 25, 2026

Advisory Details (8)

Auto-updated Jun 20, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Xerte Online Toolkits File Upload RCE via elfinder Connector | Advisories | VulnCheck

https://www.vulncheck.com/advisories/xerte-online-toolkits-file-upload-rce-via-elfinder-connector
github_commit

commit 507d55c5e91b (thexerteproject/xerteonlinetoolkits)

Fix landed in thexerteproject/xerteonlinetoolkits commit 507d55c5e91b — awaiting tagged release

https://github.com/thexerteproject/xerteonlinetoolkits/commit/507d55c5e91bf9310b5b1c7fad8aebfef902ad23
github_commit

commit 17e4f945fe6a (thexerteproject/xerteonlinetoolkits)

Fix landed in thexerteproject/xerteonlinetoolkits commit 17e4f945fe6a — awaiting tagged release

https://github.com/thexerteproject/xerteonlinetoolkits/commit/17e4f945fe6a3400fa88c01eda18c1075ee4a212
github_commit

commit 02661be88cc3 (thexerteproject/xerteonlinetoolkits)

Fix landed in thexerteproject/xerteonlinetoolkits commit 02661be88cc3 — awaiting tagged release

https://github.com/thexerteproject/xerteonlinetoolkits/commit/02661be88cc369325ea01b508086bde7fbfec805
generic

Security Vulnerabilities · Issue #1527 · thexerteproject/xerteonlinetoolkits · GitHub

https://github.com/thexerteproject/xerteonlinetoolkits/issues/1527
generic

Xerte Online Toolkits

https://xerte.org.uk/index.php/en/downloads-1/category/3-xerte-online-toolkits
generic
https://xerte.org.uk/xertetoolkits_3.15_ChangeLog.html
generic

GitHub - bootstrapbool/xerteonlinetoolkits-rce: Unauthenticated Xerte Online Toolkits exploit. Requires knowing a valid username. · GitHub

https://github.com/bootstrapbool/xerteonlinetoolkits-rce

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 56× 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 210 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/multi/http/xerte_unauthenticated_mediaupload✓ verified
    First seen Apr 22, 2026

    Xerte Online Toolkits Arbitrary File Upload - Unauthenticated Media Upload

    Open source ↗

Frequently asked(5)

What is CVE-2026-34415?
CVE-2026-34415 is a critical vulnerability published on April 22, 2026. Xerte Online Toolkits versions 3.15 and earlier contain an incomplete input validation vulnerability in the elFinder connector endpoint that fails to block PHP-executable extensions .php4 due to an incorrect regex pattern. Unauthenticated attackers can exploit this flaw combined with authentication…
When was CVE-2026-34415 disclosed?
CVE-2026-34415 was first published in the National Vulnerability Database on April 22, 2026, with the most recent update on May 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34415 actively exploited?
CVE-2026-34415 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34415?
CVE-2026-34415 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-34415?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34415, 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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