CVE-2026-16624

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-22. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.6Exploit: Elevated riskExposed: 0

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

Cal.com OSS ships lacks authorization on webhook teamId creation, allowing any authenticated user to create a webhook on any team via unvalidated teamId injection, then steal booking data, including fields like organizer/attendee emails and custom responses, and conditionally video-call passwords, by triggering webhook delivery.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
59(Track*)
EG Risk 59/100SSVC: 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
Severity96% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

July 22, 2026

Last Modified

July 27, 2026

References (3)

Vendor Advisories for CVE-2026-16624(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 32× in last 7d / 157× 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 342 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-16624?
CVE-2026-16624 is a critical vulnerability published on July 22, 2026. Cal.com OSS ships lacks authorization on webhook teamId creation, allowing any authenticated user to create a webhook on any team via unvalidated teamId injection, then steal booking data, including fields like organizer/attendee emails and custom responses, and conditionally video-call passwords,…
When was CVE-2026-16624 disclosed?
CVE-2026-16624 was first published in the National Vulnerability Database on July 22, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16624 actively exploited?
CVE-2026-16624 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 79.5% of all scored CVEs.
What is the CVSS score of CVE-2026-16624?
CVE-2026-16624 has a CVSS v3.1 base score of 9.6 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16624?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16624, 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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