CVE-2026-47207

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 78% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, Envoy crashes if an ext_proc server sends a single gRPC message containing multiple, specially crafted ProcessingResponse messages. This can occur when the first response in the batch causes the gRPC stream object to be destroyed, leading to a use-after-free error when Envoy attempts to process subsequent responses in the same gRPC message. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.

CVSS v3
6.5
EG Score
6.5(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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

June 26, 2026

Last Modified

June 27, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Envoy crashes if multiple unexpected ext_proc responses are packed into one gRPC message · Advisory · envoyproxy/envoy · GitHub

https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xv

Vendor Advisories for CVE-2026-47207(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 / 50× 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. 2026-08-21 07:13 UTCEG score recompute
  2. 2026-08-20 22:55 UTCEPSS rescore
  3. 2026-08-20 06:49 UTCEG score recompute
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-18 23:54 UTCEG score recompute
  6. 2026-08-18 13:48 UTCEPSS rescore
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  8. 2026-08-17 01:32 UTCEG score recompute
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 02:14 UTCEPSS rescore
  11. 2026-08-16 01:28 UTCEG score recompute
  12. 2026-08-15 01:30 UTCEPSS rescore
  13. 2026-08-14 01:21 UTCEG score recompute
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 01:17 UTCEG score recompute
  16. 2026-08-12 13:51 UTCEPSS rescore
  17. 2026-08-12 01:13 UTCEG score recompute
  18. 2026-08-11 01:10 UTCEG score recompute
  19. 2026-08-11 00:00 UTCEPSS rescore
  20. 2026-08-10 01:06 UTCEG score recompute
  21. 2026-08-09 13:46 UTCEPSS rescore
  22. 2026-08-09 01:03 UTCEG score recompute
  23. 2026-08-08 16:37 UTCEPSS rescore
  24. 2026-08-08 00:59 UTCEG score recompute
  25. 2026-08-07 00:56 UTCEG score recompute
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  1. 2026-08-06 13:47 UTCEPSS rescore
  2. 2026-08-06 00:51 UTCEG score recompute
  3. 2026-08-05 19:17 UTCEPSS rescore
  4. 2026-08-05 00:48 UTCEG score recompute
  5. 2026-08-04 15:10 UTCEPSS rescore
  6. 2026-08-04 10:39 UTCEPSS rescore
  7. 2026-08-04 00:40 UTCEG score recompute
  8. 2026-08-03 10:36 UTCEPSS rescore
  9. 2026-08-03 00:37 UTCEG score recompute
  10. 2026-08-02 02:27 UTCEPSS rescore
  11. 2026-08-02 00:33 UTCEG score recompute
  12. 2026-08-01 04:16 UTCEPSS rescore
  13. 2026-07-31 00:23 UTCEG score recompute
  14. 2026-07-30 16:28 UTCEPSS rescore
  15. 2026-07-30 01:30 UTCEPSS rescore
  16. 2026-07-28 20:26 UTCEG score recompute
  17. 2026-07-28 15:37 UTCEPSS rescore
  18. 2026-07-27 17:06 UTCEG score recompute
  19. 2026-07-26 14:54 UTCEPSS rescore
  20. 2026-07-26 14:34 UTCEG score recompute
  21. 2026-07-25 14:18 UTCEPSS rescore
  22. 2026-07-24 14:17 UTCEPSS rescore
  23. 2026-07-23 14:18 UTCEPSS rescore
  24. 2026-07-23 03:17 UTCEG score recompute
  25. 2026-07-22 14:08 UTCEPSS rescore
  26. 2026-07-21 15:24 UTCEPSS rescore
  27. 2026-07-20 17:08 UTCEPSS rescore
  28. 2026-07-19 14:31 UTCEPSS rescore
  29. 2026-07-19 02:29 UTCEPSS rescore
  30. 2026-07-18 10:04 UTCEPSS rescore
  31. 2026-07-16 17:03 UTCEPSS rescore
  32. 2026-07-15 16:57 UTCEPSS rescore
  33. 2026-07-15 02:00 UTCEPSS rescore
  34. 2026-07-13 22:30 UTCEPSS rescore
  35. 2026-07-13 06:13 UTCEPSS rescore
  36. 2026-07-12 05:46 UTCEPSS rescore
  37. 2026-07-11 08:27 UTCEPSS rescore
  38. 2026-07-09 19:10 UTCEPSS rescore
  39. 2026-07-08 15:16 UTCEPSS rescore
  40. 2026-07-07 13:46 UTCEPSS rescore
  41. 2026-07-06 16:27 UTCEPSS rescore
  42. 2026-07-06 02:23 UTCEPSS rescore
  43. 2026-07-05 02:30 UTCEPSS rescore
  44. 2026-07-04 06:31 UTCEPSS rescore
  45. 2026-07-01 15:07 UTCEPSS rescore
  46. 2026-06-30 23:22 UTCEPSS rescore
  47. 2026-06-29 14:06 UTCEPSS rescore
  48. 2026-06-29 14:06 UTCEPSS rescore
  49. 2026-06-28 14:07 UTCEPSS rescore
  50. 2026-06-28 04:56 UTCEPSS rescore
  51. 2026-06-28 04:56 UTCEPSS rescore
  52. 2026-06-26 19:42 UTCEG score recompute
  53. 2026-06-26 19:41 UTCNVD updatefirst tracked

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Frequently asked(5)

What is CVE-2026-47207?
CVE-2026-47207 is a medium vulnerability published on June 26, 2026. Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, Envoy crashes if an ext_proc server sends a single gRPC message containing multiple, specially crafted ProcessingResponse messages. This can occur when the…
When was CVE-2026-47207 disclosed?
CVE-2026-47207 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47207 actively exploited?
CVE-2026-47207 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 78.1% of all scored CVEs.
What is the CVSS score of CVE-2026-47207?
CVE-2026-47207 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-47207?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47207, 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

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