CVE-2026-47863

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 86% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

In Reactor Core, applications that use the Flux.bufferTimeout operator with fairBackpressure enabled are vulnerable to a Denial of Service (DoS) condition. Reactor Core 3.8.0 - 3.8.6 Reactor Core 3.7.19 and earlier

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

August 26, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Aug 27, 2026
No patch confirmed yet.
generic

Reactor Core bufferTimeout fair-backpressure pipeline permanently hangs when upstream delivers items during an active flush

https://spring.io/security/cve-2026-47863

Vendor Advisories for CVE-2026-47863(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 25× in last 7d / 90× 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.

  1. 2026-09-19 21:47 UTCEG score recompute
  2. 2026-09-19 21:47 UTCGHSA enrichment
  3. 2026-09-19 10:02 UTCGHSA enrichment
  4. 2026-09-18 21:31 UTCEG score recompute
  5. 2026-09-18 21:31 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 08:49 UTCGHSA enrichment
  8. 2026-09-17 21:03 UTCEG score recompute
  9. 2026-09-17 21:02 UTCGHSA enrichment
  10. 2026-09-17 09:16 UTCGHSA enrichment
  11. 2026-09-16 21:31 UTCEG score recompute
  12. 2026-09-16 21:31 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 09:32 UTCEG score recompute
  15. 2026-09-16 09:32 UTCGHSA enrichment
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 21:46 UTCGHSA enrichment
  18. 2026-09-15 10:00 UTCEG score recompute
  19. 2026-09-15 10:00 UTCGHSA enrichment
  20. 2026-09-14 22:15 UTCGHSA enrichment
  21. 2026-09-14 10:28 UTCGHSA enrichment
  22. 2026-09-13 22:43 UTCEG score recompute
  23. 2026-09-13 22:43 UTCGHSA enrichment
  24. 2026-09-13 16:47 UTCEPSS rescore
  25. 2026-09-13 10:57 UTCGHSA enrichment
Show 65 more
  1. 2026-09-12 23:12 UTCEG score recompute
  2. 2026-09-12 23:12 UTCGHSA enrichment
  3. 2026-09-12 11:26 UTCGHSA enrichment
  4. 2026-09-11 23:40 UTCEG score recompute
  5. 2026-09-11 23:40 UTCGHSA enrichment
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 11:53 UTCEG score recompute
  8. 2026-09-11 11:53 UTCGHSA enrichment
  9. 2026-09-11 00:03 UTCGHSA enrichment
  10. 2026-09-10 12:04 UTCEG score recompute
  11. 2026-09-10 12:04 UTCGHSA enrichment
  12. 2026-09-10 09:35 UTCEPSS rescore
  13. 2026-09-10 00:17 UTCGHSA enrichment
  14. 2026-09-09 12:32 UTCGHSA enrichment
  15. 2026-09-09 00:47 UTCEG score recompute
  16. 2026-09-09 00:47 UTCGHSA enrichment
  17. 2026-09-08 22:00 UTCEPSS rescore
  18. 2026-09-08 11:26 UTCGHSA enrichment
  19. 2026-09-07 22:08 UTCEG score recompute
  20. 2026-09-07 22:08 UTCGHSA enrichment
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-07 10:23 UTCGHSA enrichment
  23. 2026-09-06 22:37 UTCEG score recompute
  24. 2026-09-06 22:37 UTCGHSA enrichment
  25. 2026-09-06 13:47 UTCEPSS rescore
  26. 2026-09-06 10:51 UTCGHSA enrichment
  27. 2026-09-05 23:06 UTCEG score recompute
  28. 2026-09-05 23:05 UTCGHSA enrichment
  29. 2026-09-05 11:20 UTCGHSA enrichment
  30. 2026-09-04 23:34 UTCEG score recompute
  31. 2026-09-04 23:34 UTCGHSA enrichment
  32. 2026-09-04 11:35 UTCEG score recompute
  33. 2026-09-04 11:35 UTCGHSA enrichment
  34. 2026-09-04 05:06 UTCEPSS rescore
  35. 2026-09-03 23:48 UTCGHSA enrichment
  36. 2026-09-03 11:50 UTCGHSA enrichment
  37. 2026-09-02 23:40 UTCEG score recompute
  38. 2026-09-02 23:40 UTCGHSA enrichment
  39. 2026-09-02 14:12 UTCEPSS rescore
  40. 2026-09-02 11:55 UTCGHSA enrichment
  41. 2026-09-02 00:02 UTCEG score recompute▲ 1.60
  42. 2026-09-02 00:02 UTCGHSA enrichment
  43. 2026-09-02 00:02 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  44. 2026-09-01 14:06 UTCEG score recompute
  45. 2026-09-01 14:05 UTCGHSA enrichment
  46. 2026-09-01 13:54 UTCEPSS rescore
  47. 2026-08-31 15:18 UTCEG score recompute
  48. 2026-08-31 15:18 UTCGHSA enrichment
  49. 2026-08-30 19:17 UTCEPSS rescore
  50. 2026-08-30 16:34 UTCEG score recompute
  51. 2026-08-30 16:34 UTCGHSA enrichment
  52. 2026-08-30 01:22 UTCEPSS rescore
  53. 2026-08-29 17:51 UTCEG score recompute
  54. 2026-08-29 17:51 UTCGHSA enrichment
  55. 2026-08-28 21:41 UTCEPSS rescore
  56. 2026-08-28 19:06 UTCGHSA enrichment
  57. 2026-08-28 16:22 UTCGHSA enrichment
  58. 2026-08-27 17:29 UTCEG score recompute
  59. 2026-08-27 17:29 UTCGHSA enrichment
  60. 2026-08-27 17:04 UTCEG score recompute
  61. 2026-08-27 17:04 UTCGHSA enrichment
  62. 2026-08-27 14:25 UTCEPSS rescore
  63. 2026-08-27 01:22 UTCEG score recompute
  64. 2026-08-27 00:22 UTCEG score recompute
  65. 2026-08-27 00:22 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-47863?
CVE-2026-47863 is a high vulnerability published on August 26, 2026. In Reactor Core, applications that use the Flux.bufferTimeout operator with fairBackpressure enabled are vulnerable to a Denial of Service (DoS) condition. Reactor Core 3.8.0 - 3.8.6 Reactor Core 3.7.19 and earlier
When was CVE-2026-47863 disclosed?
CVE-2026-47863 was first published in the National Vulnerability Database on August 26, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47863 actively exploited?
CVE-2026-47863 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 85.7% of all scored CVEs.
What is the CVSS score of CVE-2026-47863?
CVE-2026-47863 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-47863?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47863, 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

Explore the affected products and dependency analysis for CVE-2026-47863

Explore →

Is Your Infrastructure Affected by CVE-2026-47863?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs