CVE-2026-48044

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 59% 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%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 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a specially crafted, highly compressed zstd payload can lead to massive memory allocation. An attacker can exploit this to cause severe memory exhaustion, potentially resulting in an Out-Of-Memory (OOM) kill and Denial of Service (DoS) for the Envoy proxy. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.

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%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.5%
EPSS %ILE
39th
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

Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion · Advisory · envoyproxy/envoy · GitHub

https://github.com/envoyproxy/envoy/security/advisories/GHSA-m3p9-47wh-88wg

Vendor Advisories for CVE-2026-48044(5)

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

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatopenshift-service-mesh/istio-proxyv2-rhel9:17849086822026-08-03redhat
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 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 166 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. 2026-08-30 19:21 UTCEG score recompute
  9. 2026-08-30 19:21 UTCVendor advisory
  10. 2026-08-30 19:17 UTCEPSS rescore
  11. 2026-08-30 01:22 UTCEPSS rescore
  12. 2026-08-28 21:41 UTCEPSS rescore
  13. 2026-08-27 23:04 UTCEG score recompute
  14. 2026-08-27 23:04 UTCVendor advisory
  15. 2026-08-27 14:25 UTCEPSS rescore
  16. 2026-08-26 14:46 UTCEPSS rescore
  17. 2026-08-25 13:49 UTCEPSS rescore
  18. 2026-08-24 21:49 UTCEG score recompute
  19. 2026-08-24 21:49 UTCVendor advisory
  20. 2026-08-24 06:51 UTCVendor advisory
  21. 2026-08-23 19:42 UTCVendor advisory
  22. 2026-08-23 08:32 UTCEG score recompute
  23. 2026-08-23 08:32 UTCVendor advisory
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-22 21:03 UTCVendor advisory
  26. 2026-08-22 09:30 UTCEG score recompute
  27. 2026-08-22 09:30 UTCVendor advisory
  28. 2026-08-21 23:49 UTCEPSS rescore
  29. 2026-08-21 17:23 UTCVendor advisory
  30. 2026-08-21 05:08 UTCEG score recompute
  31. 2026-08-21 05:08 UTCVendor advisory
  32. 2026-08-20 22:55 UTCEPSS rescore
  33. 2026-08-20 17:57 UTCVendor advisory
  34. 2026-08-20 06:48 UTCEG score recompute
  35. 2026-08-20 06:48 UTCVendor advisory
  36. 2026-08-19 17:04 UTCEPSS rescore
  37. 2026-08-19 12:37 UTCVendor advisory
  38. 2026-08-18 23:54 UTCEG score recompute
  39. 2026-08-18 23:54 UTCVendor advisory
  40. 2026-08-18 13:48 UTCEPSS rescore
  41. 2026-08-17 13:47 UTCEPSS rescore
  42. 2026-08-17 11:49 UTCVendor advisory
  43. 2026-08-17 00:27 UTCEG score recompute
  44. 2026-08-17 00:27 UTCVendor advisory
  45. 2026-08-16 14:56 UTCEPSS rescore
  46. 2026-08-16 13:18 UTCEG score recompute
  47. 2026-08-16 13:18 UTCVendor advisory
  48. 2026-08-16 02:14 UTCEPSS rescore
  49. 2026-08-16 02:09 UTCVendor advisory
  50. 2026-08-15 15:00 UTCVendor advisory
  51. 2026-08-15 03:51 UTCEG score recompute
  52. 2026-08-15 03:51 UTCVendor advisory
  53. 2026-08-15 01:30 UTCEPSS rescore
  54. 2026-08-14 16:41 UTCVendor advisory
  55. 2026-08-14 05:32 UTCEG score recompute
  56. 2026-08-14 05:32 UTCVendor advisory
  57. 2026-08-13 22:00 UTCEPSS rescore
  58. 2026-08-13 18:23 UTCVendor advisory
  59. 2026-08-13 05:54 UTCVendor advisory
  60. 2026-08-12 18:44 UTCEG score recompute
  61. 2026-08-12 18:44 UTCVendor advisory
  62. 2026-08-12 13:51 UTCEPSS rescore
  63. 2026-08-12 07:35 UTCVendor advisory
  64. 2026-08-11 20:26 UTCEG score recompute
  65. 2026-08-11 20:26 UTCVendor advisory
  66. 2026-08-11 09:17 UTCEG score recompute
  67. 2026-08-11 09:17 UTCVendor advisory
  68. 2026-08-11 00:00 UTCEPSS rescore
  69. 2026-08-10 22:08 UTCVendor advisory
  70. 2026-08-10 10:59 UTCVendor advisory
  71. 2026-08-09 23:47 UTCEG score recompute
  72. 2026-08-09 23:47 UTCVendor advisory
  73. 2026-08-09 13:46 UTCEPSS rescore
  74. 2026-08-09 12:39 UTCVendor advisory
  75. 2026-08-09 01:30 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-48044?
CVE-2026-48044 is a high vulnerability published on June 26, 2026. Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability has been identified in Envoy's zstd decompressor implementation (ZstdDecompressorImpl). When zstd decompression is enabled, processing a…
When was CVE-2026-48044 disclosed?
CVE-2026-48044 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-2026-48044 actively exploited?
CVE-2026-48044 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-48044?
CVE-2026-48044 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-48044?
A fix for CVE-2026-48044 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-48044 are linked in the Vendor Advisories panel on this page.

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