CVE-2026-63100

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-17. 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 weekElevated
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: Elevated riskExposed: 0

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

Maybe through 0.6.0 contains a missing authorization vulnerability that allows authenticated low-privilege member-role users to access and modify global hosting settings by exploiting unprotected show and update actions in the Settings::HostingsController, where the before_action ensure_admin filter is applied only to the clear_cache action. Attackers can read the operator's Synth API key rendered in plaintext via a form field value attribute, overwrite it with an attacker-controlled value, toggle public registration settings, and disable email confirmation requirements to disrupt the entire instance.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

July 17, 2026

Last Modified

July 21, 2026

Advisory Details (2)

Auto-updated Jul 17, 2026
No patch confirmed yet.
generic

Maybe 0.6.0 Missing Authorization via HostingsController show/update | Advisories | VulnCheck

https://www.vulncheck.com/advisories/maybe-missing-authorization-via-hostingscontroller-show-update
generic

oss/maybe.md at main · geo-chen/oss · GitHub

https://github.com/geo-chen/oss/blob/main/maybe.md

Vendor Advisories for CVE-2026-63100(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 10× in last 7d / 60× 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 133 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-63100?
CVE-2026-63100 is a medium vulnerability published on July 17, 2026. Maybe through 0.6.0 contains a missing authorization vulnerability that allows authenticated low-privilege member-role users to access and modify global hosting settings by exploiting unprotected show and update actions in the Settings::HostingsController, where the beforeaction ensureadmin filter…
When was CVE-2026-63100 disclosed?
CVE-2026-63100 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63100 actively exploited?
CVE-2026-63100 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 71.4% of all scored CVEs.
What is the CVSS score of CVE-2026-63100?
CVE-2026-63100 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-63100?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63100, 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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