CVE-2026-12039

MEDIUMPre-NVD 5.75.7
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1% (1st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-37892 (ENISA EUVD) · GHSA-4crj-qc6g-g3xj (GitHub Security Advisories)Source: ENISA EUVD

5.7EG
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: 0.1%CVSS: 5.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Docker Sandboxes (sbx) enforces an HTTP/S-only egress allowlist but does not apply it to DNS resolution: the per-network embedded DNS server forwards any queried name to the host resolver whenever the network is internet-connected, without consulting the policy. A workload inside a sandbox, which the threat model treats as untrusted, can therefore encode data into DNS labels for an attacker-controlled domain and exfiltrate it through a DNS covert channel, bypassing the configured allowlist.

CVSS
5.7
EG Score
5.7MEDIUMmedium confidence
EG Risk
26
EG Risk 26/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity57% × 45%
Impact severity (EG Severity): CVSS 5.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.7): severity, escalated by confirmed exploitation. This CVE's 5.7 is its impact severity (EG Severity), not escalated.

EG Severity
5.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-07). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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

A fix is available. 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.

The score's inputs: 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

June 18, 2026

Last Modified

October 26, 2026

Advisory Details (2)

Auto-updated Jun 20, 2026
Patch available. Sources: github_release.
GitHub release Patch Available

v0.33.0

Patch available: docker/sbx-releases v0.33.0

https://github.com/docker/sbx-releases/releases/tag/v0.33.0
Web page

Docker Sandboxes | Docker Docs

https://docs.docker.com/ai/sandboxes/

Vendor Advisories for CVE-2026-12039(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 24× 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 its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 219 rows on record for this CVE, as 98 entries (2 repeats merged).

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 119 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  3. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  4. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  5. 2026-11-07 19:47 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj · GitHub severity MODERATE
  6. 2026-11-07 19:47 UTCEchelonGraph re-scored
  7. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  8. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  9. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  10. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  11. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  12. 2026-10-29 15:52 UTCEchelonGraph re-scored
  13. 2026-10-29 15:52 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  14. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  15. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  16. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  17. 2026-10-26 11:30 UTCEchelonGraph re-scored
  18. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  19. 2026-10-25 14:50 UTCEchelonGraph re-scored
  20. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  21. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  22. 2026-10-23 07:39 UTCEchelonGraph re-scored
  23. 2026-10-23 07:38 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  24. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  25. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
Show 73 more
  1. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  2. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  3. 2026-10-18 05:04 UTCEchelonGraph re-scored
  4. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  5. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  6. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  7. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  8. 2026-10-12 16:36 UTCEchelonGraph re-scored
  9. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  10. 2026-10-11 20:12 UTCEchelonGraph re-scored
  11. 2026-10-11 18:24 UTCEchelonGraph re-scored
  12. 2026-10-11 14:58 UTCEchelonGraph re-scored
  13. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  14. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  15. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  16. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  17. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  18. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  19. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  20. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  21. 2026-10-02 16:13 UTCOSV refresh
  22. 2026-10-02 16:13 UTCOSV refresh
  23. 2026-10-02 16:12 UTCOSV refresh
  24. 2026-10-02 16:12 UTCOSV refresh
  25. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  26. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  27. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  28. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  29. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  30. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  31. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  32. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  33. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  34. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  35. 2026-09-13 13:56 UTCEchelonGraph re-scored
  36. 2026-09-13 13:56 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  37. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  38. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  39. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  40. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  41. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  42. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  43. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  44. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  45. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  46. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  47. 2026-08-30 21:00 UTCEchelonGraph re-scored
  48. 2026-08-30 21:00 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  49. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  50. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  51. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  52. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  53. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  54. 2026-08-25 07:10 UTCEchelonGraph re-scored
  55. 2026-08-25 07:09 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  56. 2026-08-24 05:11 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  57. 2026-08-23 01:12 UTCEchelonGraph re-scored
  58. 2026-08-23 01:12 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  59. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  60. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  61. 2026-08-21 11:53 UTCEchelonGraph re-scored
  62. 2026-08-21 11:53 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  63. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  64. 2026-08-20 09:41 UTCEchelonGraph re-scored
  65. 2026-08-20 09:41 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  66. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  67. 2026-08-19 07:44 UTCEchelonGraph re-scored
  68. 2026-08-19 07:44 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  69. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  70. 2026-08-16 20:44 UTCEchelonGraph re-scored
  71. 2026-08-16 20:44 UTCGHSA enrichmentGHSA-4crj-qc6g-g3xj
  72. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  73. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 4th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12039?
CVE-2026-12039 is a medium-severity vulnerability; its CVE record was published on June 18, 2026. Docker Sandboxes (sbx) enforces an HTTP/S-only egress allowlist but does not apply it to DNS resolution: the per-network embedded DNS server forwards any queried name to the host resolver whenever the network is internet-connected, without consulting the policy. A workload inside a sandbox, which…
When was the CVE record for CVE-2026-12039 published?
The CVE record for CVE-2026-12039 was published on June 18, 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 October 26, 2026; the record at its source may have been updated since.
Is CVE-2026-12039 actively exploited?
CVE-2026-12039 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-12039?
CVE-2026-12039 has a CVSS base score of 5.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-12039?
A fix for CVE-2026-12039 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-12039 are linked in the Vendor Advisories panel on this page.

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