CVE-2026-48706

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 69% 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, 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

A fix is available — apply it.

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, a vulnerability exists in Envoy's TCP StatsD sink (TcpStatsdSink), where the thread-local flusher buffer can be overflowed by exceptionally long statistic names (e.g., >16KiB). During formatting, TcpStatsdSink reserves a single contiguous memory slice of 16KiB (FLUSH_SLICE_SIZE_BYTES). If formatting a single metric exceeds the remaining capacity, the flusher initiates a buffer rotation but incorrectly continues to allocate another fixed 16KiB slice. If an attacker can trigger a statistic name longer than 16KiB—for example, by sending an HTTP or gRPC request with an extremely long request path (:path) that is recorded by the grpc_stats filter configured with stats_for_all_methods: true—the flusher will attempt to copy the metric name using memcpy operations beyond the allocated heap buffer boundaries. This leads to a heap write overflow, which can cause immediate denial-of-service (process crash) or potential remote code execution (RCE). This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

June 26, 2026

Last Modified

June 29, 2026

Advisory Details (1)

Auto-updated Jun 26, 2026
Patch available. Sources: github.
github Patch Available

Envoy Heap Buffer Overflow in TcpStatsdSink · Advisory · envoyproxy/envoy · GitHub

https://github.com/envoyproxy/envoy/security/advisories/GHSA-7q3f-gwg7-j8g4

Vendor Advisories for CVE-2026-48706(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17849537432026-08-03redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17849086392026-08-03redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17849535562026-08-03redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 89× 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 120 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-48706?
CVE-2026-48706 is a high 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, a vulnerability exists in Envoy's TCP StatsD sink (TcpStatsdSink), where the thread-local flusher buffer can be overflowed by exceptionally long statistic…
When was CVE-2026-48706 disclosed?
CVE-2026-48706 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48706 actively exploited?
CVE-2026-48706 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 69.0% of all scored CVEs.
What is the CVSS score of CVE-2026-48706?
CVE-2026-48706 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-48706?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48706, 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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