CVE-2026-77179

CRITICALPre-NVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 94% 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
Trending — 4 sources updated this week
9.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

On macOS, the virtio-fs host server used by Docker Sandboxes improperly follows symlinks when reopening an unlinked file from a stored path. A malicious guest can replace a parent directory with a symlink, escape the shared workspace, and read or modify arbitrary host files as the VMM user, potentially achieving host code execution.

CVSS v3
9.4
EG Score
9.4(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: Track

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
Severity94% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 16, 2026

Advisory Details (3)

Auto-updated Sep 17, 2026
Patch available. Sources: github_release.
github_release Patch Available

v0.42.0

Patch available: docker/sbx-releases v0.42.0

https://github.com/docker/sbx-releases/releases/tag/v0.42.0
generic

Isolation layers | Docker Docs

https://docs.docker.com/ai/sandboxes/security/isolation/
generic

Docker Sandboxes | Docker Docs

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

Vendor Advisories for CVE-2026-77179(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 42× in last 7d / 42× 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.

  1. 2026-09-20 13:17 UTCGHSA enrichment
  2. 2026-09-20 09:27 UTCGHSA enrichment
  3. 2026-09-20 05:36 UTCGHSA enrichment
  4. 2026-09-20 01:46 UTCGHSA enrichment
  5. 2026-09-19 21:56 UTCGHSA enrichment
  6. 2026-09-19 18:06 UTCEG score recompute
  7. 2026-09-19 18:06 UTCGHSA enrichment
  8. 2026-09-19 14:15 UTCGHSA enrichment
  9. 2026-09-19 10:24 UTCGHSA enrichment
  10. 2026-09-19 06:34 UTCGHSA enrichment
  11. 2026-09-19 02:42 UTCGHSA enrichment
  12. 2026-09-18 22:51 UTCEG score recompute
  13. 2026-09-18 22:51 UTCGHSA enrichment
  14. 2026-09-18 19:28 UTCEPSS rescore
  15. 2026-09-18 19:01 UTCGHSA enrichment
  16. 2026-09-18 15:10 UTCGHSA enrichment
  17. 2026-09-18 11:20 UTCGHSA enrichment
  18. 2026-09-18 07:30 UTCGHSA enrichment
  19. 2026-09-18 03:40 UTCGHSA enrichment
  20. 2026-09-17 23:49 UTCEG score recompute
  21. 2026-09-17 23:49 UTCGHSA enrichment
  22. 2026-09-17 19:22 UTCGHSA enrichment
  23. 2026-09-17 12:31 UTCGHSA enrichment
  24. 2026-09-17 08:37 UTCGHSA enrichment
  25. 2026-09-17 04:47 UTCGHSA enrichment
Show 17 more
  1. 2026-09-17 00:57 UTCGHSA enrichment
  2. 2026-09-16 21:07 UTCGHSA enrichment
  3. 2026-09-16 17:55 UTCEG score recompute
  4. 2026-09-16 17:55 UTCGHSA enrichment
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 13:49 UTCGHSA enrichment
  7. 2026-09-16 09:51 UTCGHSA enrichment
  8. 2026-09-16 06:02 UTCGHSA enrichment
  9. 2026-09-16 02:11 UTCGHSA enrichment
  10. 2026-09-15 22:20 UTCEG score recompute
  11. 2026-09-15 22:20 UTCGHSA enrichment
  12. 2026-09-15 21:48 UTCEG score recompute
  13. 2026-09-15 21:48 UTCGHSA enrichment
  14. 2026-09-15 19:22 UTCGHSA enrichment
  15. 2026-09-15 14:32 UTCEG score recompute
  16. 2026-09-15 13:43 UTCEG score recompute
  17. 2026-09-15 13:42 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77179?
CVE-2026-77179 is a critical vulnerability published on September 15, 2026. On macOS, the virtio-fs host server used by Docker Sandboxes improperly follows symlinks when reopening an unlinked file from a stored path. A malicious guest can replace a parent directory with a symlink, escape the shared workspace, and read or modify arbitrary host files as the VMM user,…
When was CVE-2026-77179 disclosed?
CVE-2026-77179 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77179 actively exploited?
CVE-2026-77179 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 94.4% of all scored CVEs.
What is the CVSS score of CVE-2026-77179?
CVE-2026-77179 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2026-77179?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77179, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-77179

Explore →

Is Your Infrastructure Affected by CVE-2026-77179?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs