CVE-2026-84800

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-02. a secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

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

Craft CMS versions >= 5.0.0-RC1 and < 5.10.11 contain a missing authorization vulnerability in AssetsController::actionReplaceFile. When a request supplies sourceAssetId and targetFilename but omits assetId, the target asset is resolved by folder and filename after the permission checks execute, so the replacePeerFiles permission is never enforced. An authenticated low-privilege author with only the replaceFiles permission on a shared folder can overwrite the content of a peer's asset file (located in the same folder) with attacker-controlled bytes. Fixed in 5.10.11.

CVSS v3
7.1
EG Score
7.1(high)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 2, 2026

Advisory Details (2)

Auto-updated Sep 2, 2026
Patch available. Sources: github.
generic

Craft CMS 5.0.0-RC1 before 5.10.11 File Overwrite via assets/replace-file | Advisories | VulnCheck

https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.11-file-overwrite-via-assets-replace-file
github Patch Available

Peer asset file overwrite via assets/replace-file late-discovered target skips permission check · Advisory · craftcms/cms · GitHub

https://github.com/craftcms/cms/security/advisories/GHSA-329j-cx85-8r56

Vendor Advisories for CVE-2026-84800(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 93× 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.

  1. 2026-09-25 07:00 UTCGHSA enrichment
  2. 2026-09-24 19:16 UTCEG score recompute
  3. 2026-09-24 19:16 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 07:33 UTCGHSA enrichment
  6. 2026-09-23 19:49 UTCEG score recompute
  7. 2026-09-23 19:49 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 07:03 UTCGHSA enrichment
  10. 2026-09-22 19:20 UTCEG score recompute
  11. 2026-09-22 19:20 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 07:29 UTCEG score recompute
  14. 2026-09-22 07:29 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 19:45 UTCGHSA enrichment
  17. 2026-09-21 08:01 UTCGHSA enrichment
  18. 2026-09-20 20:18 UTCEG score recompute
  19. 2026-09-20 20:18 UTCGHSA enrichment
  20. 2026-09-20 20:16 UTCEPSS rescore
  21. 2026-09-20 08:35 UTCGHSA enrichment
  22. 2026-09-19 20:51 UTCEG score recompute
  23. 2026-09-19 20:51 UTCGHSA enrichment
  24. 2026-09-19 09:08 UTCGHSA enrichment
  25. 2026-09-18 21:24 UTCEG score recompute
Show 68 more
  1. 2026-09-18 21:24 UTCGHSA enrichment
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 08:31 UTCGHSA enrichment
  4. 2026-09-17 20:47 UTCEG score recompute
  5. 2026-09-17 20:47 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-17 09:04 UTCGHSA enrichment
  8. 2026-09-16 21:21 UTCEG score recompute
  9. 2026-09-16 21:21 UTCGHSA enrichment
  10. 2026-09-16 14:09 UTCEPSS rescore
  11. 2026-09-16 09:04 UTCEG score recompute
  12. 2026-09-16 09:04 UTCGHSA enrichment
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 21:10 UTCGHSA enrichment
  15. 2026-09-15 09:27 UTCEG score recompute
  16. 2026-09-15 09:27 UTCGHSA enrichment
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-14 21:44 UTCGHSA enrichment
  20. 2026-09-14 10:01 UTCGHSA enrichment
  21. 2026-09-13 22:17 UTCEG score recompute
  22. 2026-09-13 22:17 UTCGHSA enrichment
  23. 2026-09-13 10:34 UTCGHSA enrichment
  24. 2026-09-12 22:51 UTCEG score recompute
  25. 2026-09-12 22:51 UTCGHSA enrichment
  26. 2026-09-12 11:07 UTCGHSA enrichment
  27. 2026-09-11 23:16 UTCEG score recompute
  28. 2026-09-11 23:16 UTCGHSA enrichment
  29. 2026-09-11 14:53 UTCEPSS rescore
  30. 2026-09-11 14:53 UTCEPSS rescore
  31. 2026-09-11 10:54 UTCEG score recompute
  32. 2026-09-11 10:54 UTCGHSA enrichment
  33. 2026-09-10 23:11 UTCGHSA enrichment
  34. 2026-09-10 11:28 UTCEG score recompute
  35. 2026-09-10 11:28 UTCGHSA enrichment
  36. 2026-09-09 23:33 UTCGHSA enrichment
  37. 2026-09-09 10:58 UTCGHSA enrichment
  38. 2026-09-08 23:14 UTCEG score recompute
  39. 2026-09-08 23:14 UTCGHSA enrichment
  40. 2026-09-08 22:01 UTCEPSS rescore
  41. 2026-09-08 11:26 UTCGHSA enrichment
  42. 2026-09-07 23:43 UTCEG score recompute
  43. 2026-09-07 23:43 UTCGHSA enrichment
  44. 2026-09-07 12:00 UTCGHSA enrichment
  45. 2026-09-07 00:14 UTCEG score recompute
  46. 2026-09-07 00:14 UTCGHSA enrichment
  47. 2026-09-06 13:48 UTCEPSS rescore
  48. 2026-09-06 12:25 UTCGHSA enrichment
  49. 2026-09-06 00:42 UTCEG score recompute
  50. 2026-09-06 00:42 UTCGHSA enrichment
  51. 2026-09-05 15:31 UTCEPSS rescore
  52. 2026-09-05 12:58 UTCGHSA enrichment
  53. 2026-09-05 01:14 UTCEG score recompute
  54. 2026-09-05 01:13 UTCGHSA enrichment
  55. 2026-09-04 13:30 UTCEG score recompute
  56. 2026-09-04 13:30 UTCGHSA enrichment
  57. 2026-09-04 05:07 UTCEPSS rescore
  58. 2026-09-04 01:45 UTCGHSA enrichment
  59. 2026-09-03 13:59 UTCGHSA enrichment
  60. 2026-09-03 02:14 UTCGHSA enrichment
  61. 2026-09-02 14:28 UTCGHSA enrichment
  62. 2026-09-02 14:13 UTCEG score recompute
  63. 2026-09-02 14:12 UTCGHSA enrichment
  64. 2026-09-02 13:33 UTCEG score recompute
  65. 2026-09-02 13:32 UTCGHSA enrichment
  66. 2026-09-02 12:26 UTCEG score recompute
  67. 2026-09-02 11:25 UTCEG score recompute
  68. 2026-09-02 11:23 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84800?
CVE-2026-84800 is a high vulnerability published on September 2, 2026. Craft CMS versions >= 5.0.0-RC1 and < 5.10.11 contain a missing authorization vulnerability in AssetsController::actionReplaceFile. When a request supplies sourceAssetId and targetFilename but omits assetId, the target asset is resolved by folder and filename after the permission checks execute, so…
When was CVE-2026-84800 disclosed?
CVE-2026-84800 was first published in the National Vulnerability Database on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84800 actively exploited?
CVE-2026-84800 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 73.9% of all scored CVEs.
What is the CVSS score of CVE-2026-84800?
CVE-2026-84800 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-84800?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84800, 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.

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