CVE-2026-84204

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-01. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

GROWI contains an access control vulnerability in the GET /_api/v3/attachment/:id endpoint that fails to validate page access permissions. Authenticated attackers can retrieve attachment metadata from pages they cannot view by supplying known attachment identifiers.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 8, 2026

Advisory Details (5)

Auto-updated Sep 1, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

GROWI through 8.0.2 Missing Authorization on apiv3 Attachment Retrieval | Advisories | VulnCheck

https://www.vulncheck.com/advisories/growi-through-8.0.2-missing-authorization-on-apiv3-attachment-retrieval
generic

growi/apps/app/src/server/routes/apiv3/attachment.js at v8.0.2 · growilabs/growi · GitHub

https://github.com/growilabs/growi/blob/v8.0.2/apps/app/src/server/routes/apiv3/attachment.js
github_commit

commit d298e0b1dbbf (growilabs/growi)

Fix landed in growilabs/growi commit d298e0b1dbbf — awaiting tagged release

https://github.com/growilabs/growi/commit/d298e0b1dbbf568c99db657fa0f7e90f72ddc59b
github_pr

fix: Enforce access control on revision-by-id and attachment-by-id apiv3 routes

Fix merged in growilabs/growi PR #11810 on 2026-08-27 — awaiting tagged release

https://github.com/growilabs/growi/pull/11810
generic

GitHub - growilabs/growi: :anchor: GROWI - Team collaboration software using markdown · GitHub

https://github.com/growilabs/growi

Vendor Advisories for CVE-2026-84204(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 18× in last 7d / 63× 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. 2026-09-24 14:26 UTCEG score recompute
  2. 2026-09-24 14:26 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 15:10 UTCGHSA enrichment
  6. 2026-09-22 16:13 UTCEG score recompute
  7. 2026-09-22 16:13 UTCGHSA enrichment
  8. 2026-09-22 16:01 UTCEPSS rescore
  9. 2026-09-21 21:09 UTCEPSS rescore
  10. 2026-09-21 17:13 UTCEG score recompute
  11. 2026-09-21 17:13 UTCGHSA enrichment
  12. 2026-09-20 20:16 UTCEPSS rescore
  13. 2026-09-20 17:41 UTCGHSA enrichment
  14. 2026-09-19 18:40 UTCEG score recompute
  15. 2026-09-19 18:40 UTCGHSA enrichment
  16. 2026-09-18 19:42 UTCEG score recompute
  17. 2026-09-18 19:42 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-17 20:43 UTCEG score recompute
  20. 2026-09-17 20:43 UTCGHSA enrichment
  21. 2026-09-17 19:32 UTCEPSS rescore
  22. 2026-09-16 18:39 UTCEG score recompute
  23. 2026-09-16 18:39 UTCGHSA enrichment
  24. 2026-09-16 14:09 UTCEPSS rescore
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 38 more
  1. 2026-09-15 17:27 UTCEG score recompute
  2. 2026-09-15 17:26 UTCGHSA enrichment
  3. 2026-09-15 03:12 UTCEPSS rescore
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-14 18:29 UTCGHSA enrichment
  6. 2026-09-13 19:25 UTCEG score recompute
  7. 2026-09-13 19:25 UTCGHSA enrichment
  8. 2026-09-12 20:28 UTCEG score recompute
  9. 2026-09-12 20:28 UTCGHSA enrichment
  10. 2026-09-11 21:31 UTCEG score recompute
  11. 2026-09-11 21:31 UTCGHSA enrichment
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-10 22:34 UTCEG score recompute
  15. 2026-09-10 22:34 UTCGHSA enrichment
  16. 2026-09-09 23:37 UTCGHSA enrichment
  17. 2026-09-08 20:50 UTCGHSA enrichment
  18. 2026-09-08 10:02 UTCEG score recompute
  19. 2026-09-08 10:01 UTCGHSA enrichment
  20. 2026-09-07 10:23 UTCEG score recompute
  21. 2026-09-07 10:23 UTCGHSA enrichment
  22. 2026-09-06 13:48 UTCEPSS rescore
  23. 2026-09-06 11:24 UTCEG score recompute
  24. 2026-09-06 11:24 UTCGHSA enrichment
  25. 2026-09-05 15:31 UTCEPSS rescore
  26. 2026-09-05 12:27 UTCEG score recompute
  27. 2026-09-05 12:27 UTCGHSA enrichment
  28. 2026-09-04 13:30 UTCEG score recompute
  29. 2026-09-04 13:30 UTCGHSA enrichment
  30. 2026-09-04 05:07 UTCEPSS rescore
  31. 2026-09-03 14:32 UTCGHSA enrichment
  32. 2026-09-02 15:34 UTCEG score recompute
  33. 2026-09-02 15:34 UTCGHSA enrichment
  34. 2026-09-02 14:12 UTCEPSS rescore
  35. 2026-09-01 16:25 UTCEG score recompute
  36. 2026-09-01 16:09 UTCEG score recompute
  37. 2026-09-01 15:44 UTCEG score recompute
  38. 2026-09-01 15:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84204?
CVE-2026-84204 is a medium vulnerability published on September 1, 2026. GROWI contains an access control vulnerability in the GET /_api/v3/attachment/:id endpoint that fails to validate page access permissions. Authenticated attackers can retrieve attachment metadata from pages they cannot view by supplying known attachment identifiers.
When was CVE-2026-84204 disclosed?
CVE-2026-84204 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84204 actively exploited?
CVE-2026-84204 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 67.0% of all scored CVEs.
What is the CVSS score of CVE-2026-84204?
CVE-2026-84204 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-84204?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84204, 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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