CVE-2025-51846

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-04-30. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users of a CryptPad instance. Fixed in 2026.2.2.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

April 30, 2026

Last Modified

May 4, 2026

Advisory Details (4)

Auto-updated Apr 30, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic
https://www.cve.org/CVERecord?id=CVE-2025-51846
generic
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-119-01.json
generic

Add rate limiting to the nginx advanced configuration example by Chouhartem · Pull Request #2239 · cryptpad/cryptpad · GitHub

https://github.com/cryptpad/cryptpad/pull/2239/changes/1e0c06ad8a0c5dab795f85f9730ec2693320c62e
generic🟡 PoC Available

cryptpad-cve-2025-51846-advisory/README.md at main · JohnPerifanis/cryptpad-cve-2025-51846-advisory · GitHub

https://github.com/JohnPerifanis/cryptpad-cve-2025-51846-advisory/blob/main/README.md

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 31× 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 219 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2025-51846?
CVE-2025-51846 is a high vulnerability published on April 30, 2026. CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users of a CryptPad instance. Fixed in 2026.2.2.
When was CVE-2025-51846 disclosed?
CVE-2025-51846 was first published in the National Vulnerability Database on April 30, 2026, with the most recent update on May 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-51846 actively exploited?
CVE-2025-51846 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 54.2% of all scored CVEs.
What is the CVSS score of CVE-2025-51846?
CVE-2025-51846 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-51846?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-51846, 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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