CVE-2026-64777

MEDIUMPre-NVD 4.34.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 4.3 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.3% (25th 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
4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.3Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

A malicious builder peer may be able to request an in-context file by name from the host and receive the contents of whatever the name resolves to, even when it resolves outside the build context. This vulnerability is addressed in container version 1.2.0.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
19
EG Risk 19/100

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)
Severity43% × 45%
The EG Score, 4.3 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.3%
EPSS %ILE
25th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (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

August 27, 2026

Advisory Details (1)

Auto-updated Aug 20, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

Build filesystem sync discloses host files outside the build context via symlinks · Advisory · apple/container · GitHub

https://github.com/apple/container/security/advisories/GHSA-2v2q-4q35-h585

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 46× 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 0.3% · 25th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  3. 2026-10-12 15:47 UTCEG score recompute
  4. 2026-10-11 19:32 UTCEG score recompute
  5. 2026-10-11 16:47 UTCEG score recompute
  6. 2026-10-11 14:08 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-10-09 08:20 UTCEG score recompute
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  12. 2026-10-08 05:14 UTCEG score recompute
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  14. 2026-10-06 17:03 UTCEG score recompute
  15. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  17. 2026-10-05 17:08 UTCEG score recompute
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  19. 2026-10-03 16:46 UTCEG score recompute
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  21. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  22. 2026-10-02 08:01 UTCEG score recompute
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  24. 2026-10-01 08:06 UTCEG score recompute
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 24th percentile
Show 63 more
  1. 2026-09-30 08:10 UTCEG score recompute
  2. 2026-09-29 02:47 UTCEG score recompute
  3. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  4. 2026-09-28 02:52 UTCEG score recompute
  5. 2026-09-27 02:56 UTCEG score recompute
  6. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  7. 2026-09-25 00:43 UTCEG score recompute
  8. 2026-09-24 00:48 UTCEG score recompute
  9. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-09-23 00:53 UTCEG score recompute
  11. 2026-09-22 00:58 UTCEG score recompute
  12. 2026-09-21 01:03 UTCEG score recompute
  13. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-09-20 01:06 UTCEG score recompute
  15. 2026-09-19 01:07 UTCEG score recompute
  16. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-09-18 01:12 UTCEG score recompute
  18. 2026-09-17 01:17 UTCEG score recompute
  19. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-09-16 01:22 UTCEG score recompute
  22. 2026-09-14 01:30 UTCEG score recompute
  23. 2026-09-13 01:35 UTCEG score recompute
  24. 2026-09-12 01:40 UTCEG score recompute
  25. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  27. 2026-09-11 01:45 UTCEG score recompute
  28. 2026-09-09 01:54 UTCEG score recompute
  29. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  30. 2026-09-08 01:01 UTCEG score recompute
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  32. 2026-09-07 01:05 UTCEG score recompute
  33. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  34. 2026-09-06 01:11 UTCEG score recompute
  35. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  36. 2026-09-05 01:07 UTCEG score recompute
  37. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  38. 2026-09-03 01:13 UTCEG score recompute
  39. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  40. 2026-09-02 01:11 UTCEG score recompute
  41. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  42. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  43. 2026-08-31 01:19 UTCEG score recompute
  44. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  45. 2026-08-30 01:23 UTCEG score recompute
  46. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  47. 2026-08-29 01:28 UTCEG score recompute
  48. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  49. 2026-08-27 18:21 UTCEG score recompute
  50. 2026-08-26 17:53 UTCEG score recompute
  51. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  52. 2026-08-25 16:58 UTCEG score recompute
  53. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  54. 2026-08-24 16:48 UTCEG score recompute
  55. 2026-08-23 20:05 UTCEG score recompute
  56. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  57. 2026-08-22 20:10 UTCEG score recompute
  58. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  59. 2026-08-20 19:52 UTCEG score recomputeFirst assessed: 4.3 MEDIUM
  60. 2026-08-20 19:51 UTCMITRE cvelistV5CVSS v3 → 4.3 · severity → MEDIUM
  61. 2026-08-20 19:17 UTCNVD update
  62. 2026-08-20 19:12 UTCEG score recompute
  63. 2026-08-20 19:11 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-64777?
CVE-2026-64777 is a medium-severity vulnerability; its CVE record was published on August 20, 2026. A malicious builder peer may be able to request an in-context file by name from the host and receive the contents of whatever the name resolves to, even when it resolves outside the build context. This vulnerability is addressed in container version 1.2.0.
When was the CVE record for CVE-2026-64777 published?
The CVE record for CVE-2026-64777 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 August 27, 2026; the record at its source may have been updated since.
Is CVE-2026-64777 actively exploited?
CVE-2026-64777 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64777?
CVE-2026-64777 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64777?
The CVE record for CVE-2026-64777 names the fix: "This vulnerability is addressed in container version 1.2.0."

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