CVE-2026-63768

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-07-20. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

cal.diy through 6.2.0 contains an open redirect vulnerability in the conferencing OAuth callback endpoint that allows attackers to redirect users to arbitrary URLs by crafting malicious state parameters. Attackers can exploit the unsigned state parameter and onErrorReturnTo field to silently redirect visitors from the trusted domain to attacker-controlled URLs for phishing attacks.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

July 20, 2026

Last Modified

September 17, 2026

Advisory Details (3)

Auto-updated Jul 20, 2026
No patch confirmed yet. Sources: github_pr.
generic

cal.diy 6.2.0 Conferencing OAuth Callback Open Redirect via Unsigned State | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cal-diy-conferencing-oauth-callback-open-redirect-via-unsigned-state
github_pr

fix(conferencing): prevent oauth callback open redirect

Upstream fix in progress (PR #29681 · calcom/cal.diy, state=open)

https://github.com/calcom/cal.diy/pull/29681
generic

Open Redirect via Unsigned Conferencing OAuth Callback State · Issue #29679 · calcom/cal.diy · GitHub

https://github.com/calcom/cal.diy/issues/29679

Vendor Advisories for CVE-2026-63768(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 12× 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.

Showing the most recent 100 of 156 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-63768?
CVE-2026-63768 is a medium vulnerability published on July 20, 2026. cal.diy through 6.2.0 contains an open redirect vulnerability in the conferencing OAuth callback endpoint that allows attackers to redirect users to arbitrary URLs by crafting malicious state parameters. Attackers can exploit the unsigned state parameter and onErrorReturnTo field to silently…
When was CVE-2026-63768 disclosed?
CVE-2026-63768 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63768 actively exploited?
CVE-2026-63768 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 72.1% of all scored CVEs.
What is the CVSS score of CVE-2026-63768?
CVE-2026-63768 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-63768?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63768, 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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