CVE-2025-71389

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-24. a secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: None knownExposed: 0

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

Cal.com (calcom/cal.diy) before 5.9.9 is vulnerable to unauthenticated remote code execution because it bundles a version of Next.js whose React Server Components (RSC) request handling deserializes attacker-controlled input. A remote attacker can send a crafted RSC request to the server and cause arbitrary code to be executed during server-side processing, without authentication or user interaction. The flaw derives from the upstream Next.js vulnerability CVE-2025-55182 and is resolved in 5.9.9 by updating the affected dependency.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
66%
KEV
Not listed

Published

July 23, 2026

Last Modified

July 30, 2026

Advisory Details (4)

Auto-updated Aug 27, 2026
Patch available. Sources: github, github_pr.
generic

Cal.com before 5.9.9 Remote Code Execution via RSC | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cal-com-before-remote-code-execution-via-rsc
github Patch Available

Cal.com affected by CVE-2025-55182 and CVE-2025-66478 · Advisory · calcom/cal.diy · GitHub

https://github.com/calcom/cal.diy/security/advisories/GHSA-qjx2-5xqp-cpf4
github_pr Patch Available

chore: bump nextjs version

Patch available: calcom/cal.diy v6.0.2 (PR #25592 merged 2025-12-04)

https://github.com/calcom/cal.diy/pull/25592
github Patch Available

Next.js is vulnerable to RCE in React flight protocol · GHSA-9qr9-h5gf-34mp · GitHub Advisory Database · GitHub

https://github.com/advisories/GHSA-9qr9-h5gf-34mp

Vendor Advisories for CVE-2025-71389(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 41× in last 7d / 210× 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 259 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-71389?
CVE-2025-71389 is a critical vulnerability published on July 23, 2026. Cal.com (calcom/cal.diy) before 5.9.9 is vulnerable to unauthenticated remote code execution because it bundles a version of Next.js whose React Server Components (RSC) request handling deserializes attacker-controlled input. A remote attacker can send a crafted RSC request to the server and cause…
When was CVE-2025-71389 disclosed?
CVE-2025-71389 was first published in the National Vulnerability Database on July 23, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-71389 actively exploited?
CVE-2025-71389 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 34.5% of all scored CVEs.
What is the CVSS score of CVE-2025-71389?
CVE-2025-71389 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2025-71389?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-71389, 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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