CVE-2026-64773

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.5 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.4% (35th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from CISA-ADP (Vulnrichment) CVSS v3.1
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

An attacker that can reach a container's published TCP port may be able to force the host's forwarding process to buffer an unbounded amount of that client's data in memory, for as long as the backend container connection takes to complete — with no cap on how much accumulates or how long the wait can be stretched. This vulnerability is addressed in container version 1.2.0.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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 (value × EchelonGraph’s weight)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 20, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Aug 28, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

TCP port forwarder buffers unbounded pre-connect data from published container ports · Advisory · apple/container · GitHub

https://github.com/apple/container/security/advisories/GHSA-wg28-286f-56v6

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 47× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-10-13 11:37 UTCEG score recompute
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-10-12 15:47 UTCEG score recompute
  5. 2026-10-11 19:32 UTCEG score recompute
  6. 2026-10-11 16:47 UTCEG score recompute
  7. 2026-10-11 14:08 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-10-09 08:16 UTCEG score recompute
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  13. 2026-10-08 05:12 UTCEG score recompute
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  15. 2026-10-06 16:52 UTCEG score recompute
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  17. 2026-10-06 03:12 UTCEG score recompute
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  19. 2026-10-05 09:45 UTCEG score recompute
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-10-03 16:46 UTCEG score recompute
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  23. 2026-10-03 01:49 UTCEG score recompute
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-10-01 22:50 UTCEG score recompute
Show 60 more
  1. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  2. 2026-09-30 21:02 UTCEG score recompute
  3. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  4. 2026-09-30 08:08 UTCEG score recompute
  5. 2026-09-28 21:37 UTCEG score recompute
  6. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  7. 2026-09-27 15:54 UTCEG score recompute
  8. 2026-09-27 02:54 UTCEG score recompute
  9. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  10. 2026-09-25 00:40 UTCEG score recompute
  11. 2026-09-22 19:45 UTCEG score recompute
  12. 2026-09-22 04:37 UTCEG score recompute
  13. 2026-09-21 02:48 UTCEG score recompute
  14. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-09-20 00:58 UTCEG score recompute
  16. 2026-09-18 23:07 UTCEG score recompute
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  18. 2026-09-17 21:19 UTCEG score recompute
  19. 2026-09-16 14:32 UTCEG score recompute
  20. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  21. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  22. 2026-09-15 12:44 UTCEG score recompute
  23. 2026-09-13 22:02 UTCEG score recompute
  24. 2026-09-12 20:14 UTCEG score recompute
  25. 2026-09-11 18:25 UTCEG score recompute
  26. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  27. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  28. 2026-09-10 16:36 UTCEG score recompute
  29. 2026-09-09 01:53 UTCEG score recompute
  30. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  31. 2026-09-07 19:32 UTCEG score recompute
  32. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  33. 2026-09-06 17:43 UTCEG score recompute
  34. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  35. 2026-09-05 15:54 UTCEG score recompute
  36. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  37. 2026-09-04 14:04 UTCEG score recompute
  38. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  39. 2026-09-02 22:37 UTCEG score recompute
  40. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  41. 2026-09-01 20:45 UTCEG score recompute
  42. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  43. 2026-09-01 11:19 UTCEG score recompute
  44. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  45. 2026-08-30 20:36 UTCEG score recompute
  46. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  47. 2026-08-30 07:42 UTCEG score recompute
  48. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  49. 2026-08-29 05:39 UTCEG score recompute
  50. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  51. 2026-08-28 15:33 UTCEG score recomputeFirst assessed: 7.5 HIGH
  52. 2026-08-28 15:25 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  53. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  54. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  55. 2026-08-24 00:16 UTCEG score recompute
  56. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  57. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  58. 2026-08-20 22:23 UTCNVD update
  59. 2026-08-20 21:32 UTCEG score recompute
  60. 2026-08-20 21:31 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-64773?
CVE-2026-64773 is a high-severity vulnerability; its CVE record was published on August 20, 2026. An attacker that can reach a container's published TCP port may be able to force the host's forwarding process to buffer an unbounded amount of that client's data in memory, for as long as the backend container connection takes to complete — with no cap on how much accumulates or how long the wait…
When was the CVE record for CVE-2026-64773 published?
The CVE record for CVE-2026-64773 was published on August 20, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 1, 2026; the record at its source may have been updated since.
Is CVE-2026-64773 actively exploited?
CVE-2026-64773 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64773?
CVE-2026-64773 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64773?
The CVE record for CVE-2026-64773 names the fix: "This vulnerability is addressed in container version 1.2.0."

Dependency Blast Radius

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