CVE-2026-48706

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 52% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
38
EG Risk 38/100

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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
EPSS PROB
0.6%
EPSS %ILE
47th
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 / EcosystemFix (by version range) / PatchReleasedSource
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17849535562026-08-03redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17849086392026-08-03redhat
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17849537432026-08-03redhat

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 4× in last 7d / 29× 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 175 total refreshes for this CVE.

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

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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 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 0.6% probability of exploitation in the next 30 days (47th percentile of EPSS-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?
A fix for CVE-2026-48706 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-48706 are linked in the Vendor Advisories panel on this page.

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