CVE-2025-71389

CRITICALPre-NVD 10.010.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.4%CVSS: 10.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
10.0CRITICALmedium confidence
EG Risk
61
EG Risk 61/100

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 (value × EchelonGraph’s weight)
Severity100% × 45%
The EG Score, 10.0 of 10.
Exploitation1.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.4%
EPSS %ILE
71st
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 23, 2026

Last Modified

September 29, 2026

Advisory Details (4)

Auto-updated Oct 13, 2026
Patch available. Sources: github, github_pr.
Web page

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 advisoryMentions a patch (unverified)

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 pull request 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 advisoryMentions a patch (unverified)

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 19× in last 7d / 72× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 399 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 300 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 08:12 UTCEG score recompute
  2. 2026-10-16 08:12 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  3. 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  4. 2026-10-15 07:16 UTCEG score recompute
  5. 2026-10-15 07:15 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  6. 2026-10-14 16:31 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  7. 2026-10-14 03:14 UTCEG score recompute
  8. 2026-10-14 03:13 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  9. 2026-10-13 16:33 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  10. 2026-10-12 23:14 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  11. 2026-10-12 16:45 UTCEG score recompute
  12. 2026-10-12 16:33 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  13. 2026-10-12 10:02 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  14. 2026-10-11 20:20 UTCEG score recompute
  15. 2026-10-11 18:32 UTCEG score recompute
  16. 2026-10-11 15:06 UTCEG score recompute
  17. 2026-10-11 13:47 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  18. 2026-10-10 19:59 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  19. 2026-10-09 20:06 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  20. 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  21. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  22. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  23. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  24. 2026-10-04 12:42 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  25. 2026-10-04 08:19 UTCEG score recompute
Show 74 more
  1. 2026-10-04 08:19 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  2. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  3. 2026-10-03 03:23 UTCEG score recompute
  4. 2026-10-03 03:23 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  5. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  6. 2026-10-01 15:19 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  7. 2026-10-01 10:58 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  8. 2026-10-01 06:15 UTCEG score recompute
  9. 2026-10-01 06:15 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  10. 2026-09-30 15:02 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  11. 2026-09-29 15:20 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  12. 2026-09-29 14:17 UTCEG score recompute
  13. 2026-09-29 14:17 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  14. 2026-09-28 13:50 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  15. 2026-09-28 09:24 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  16. 2026-09-28 05:03 UTCEG score recompute
  17. 2026-09-28 05:03 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  18. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  19. 2026-09-24 14:02 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  20. 2026-09-24 11:23 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  21. 2026-09-24 07:03 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  22. 2026-09-24 02:41 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  23. 2026-09-23 22:20 UTCEG score recompute
  24. 2026-09-23 22:20 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  25. 2026-09-23 13:47 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  26. 2026-09-23 11:43 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  27. 2026-09-23 07:22 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  28. 2026-09-23 03:01 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  29. 2026-09-22 22:40 UTCEG score recompute
  30. 2026-09-22 22:40 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  31. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  32. 2026-09-20 06:06 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  33. 2026-09-20 01:45 UTCEG score recompute
  34. 2026-09-20 01:45 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  35. 2026-09-18 22:30 UTCEG score recompute
  36. 2026-09-18 22:30 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  37. 2026-09-18 19:27 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  38. 2026-09-18 11:46 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  39. 2026-09-18 07:25 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  40. 2026-09-18 03:03 UTCEG score recompute
  41. 2026-09-18 03:03 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  42. 2026-09-17 19:30 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  43. 2026-09-17 09:16 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  44. 2026-09-17 02:00 UTCEG score recompute
  45. 2026-09-17 02:00 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  46. 2026-09-16 14:07 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  47. 2026-09-16 12:00 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  48. 2026-09-16 06:45 UTCEG score recompute
  49. 2026-09-16 06:45 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  50. 2026-09-16 05:14 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  51. 2026-09-15 09:48 UTCEG score recompute
  52. 2026-09-15 09:48 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  53. 2026-09-15 03:10 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  54. 2026-09-14 16:12 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  55. 2026-09-14 11:28 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  56. 2026-09-14 07:07 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  57. 2026-09-14 02:46 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  58. 2026-09-13 22:22 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  59. 2026-09-13 17:35 UTCEG score recompute
  60. 2026-09-13 17:35 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  61. 2026-09-13 16:46 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  62. 2026-09-13 13:14 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  63. 2026-09-13 08:53 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  64. 2026-09-13 04:32 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  65. 2026-09-13 00:11 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  66. 2026-09-12 18:56 UTCEG score recompute
  67. 2026-09-12 18:56 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  68. 2026-09-12 15:00 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  69. 2026-09-12 14:26 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  70. 2026-09-12 10:05 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  71. 2026-09-12 05:44 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  72. 2026-09-12 01:23 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  73. 2026-09-11 21:02 UTCGHSA enrichmentGHSA-8449-9vw6-7mp5 · GitHub severity CRITICAL · GitHub CVSS 10.0
  74. 2026-09-11 16:41 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-71389?
CVE-2025-71389 is a critical-severity vulnerability; its CVE record was 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 made public?
CVE-2025-71389 was made public on December 7, 2025: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 23, 2026. EchelonGraph's copy of the record carries a last-modified date of September 29, 2026; the record at its source may have been updated since.
Is CVE-2025-71389 actively exploited?
CVE-2025-71389 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% probability of exploitation in the next 30 days (71st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-71389?
CVE-2025-71389 has a CVSS base score of 10.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-71389?
A fix for CVE-2025-71389 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-71389 are linked in the Vendor Advisories panel on this page.

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