CVE-2026-61670

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory (severity: MODERATE) published 2026-09-22. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-83445 (ENISA EUVD) · GHSA-m8f5-rh7h-vgg3 (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
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: 0.2%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

microsandbox is an easy, fast, local-first microVM runtime and library. Prior to 0.5.10, sdk/rust/lib/runtime/spawn.rs serializes NetworkConfig secret values into the --network-config argument and passes per-sandbox secrets through repeated --env arguments accepted by crates/cli/lib/sandbox_cmd.rs. Other local users or co-resident processes can read these values through the host process table, including /proc process command lines on Linux and process listings on Linux and macOS, for the lifetime of the sandbox. Exploitation does not require code execution inside the sandbox or access to the spawning user's session, and can disclose host-side API keys, tokens, and environment secrets on shared hosts, CI runners, and developer systems. This issue is fixed in version 0.5.10.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
5th
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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

September 18, 2026

Last Modified

September 24, 2026

Advisory Details (6)

Auto-updated Sep 18, 2026
Patch available. Sources: github_commit, github_release, github, github_pr.
GitHub release Patch Available

v0.5.10

Patch available: superradcompany/microsandbox v0.5.10

https://github.com/superradcompany/microsandbox/releases/tag/v0.5.10
GitHub commit

commit fbfb2366bfaf (superradcompany/microsandbox)

Fix landed in superradcompany/microsandbox commit fbfb2366bfaf — awaiting tagged release

https://github.com/superradcompany/microsandbox/commit/fbfb2366bfafad5e6df8778183f95fd8ca3c00a4
GitHub commit

commit 2ac6a177b112 (superradcompany/microsandbox)

Fix landed in superradcompany/microsandbox commit 2ac6a177b112 — awaiting tagged release

https://github.com/superradcompany/microsandbox/commit/2ac6a177b11212d392bf1e7dc77aaf14e4768aa8
GitHub pull request

feat(sandbox): move bulky config onto an inherited config fd

Fix merged in superradcompany/microsandbox PR #1006 on 2026-06-22 — awaiting tagged release

https://github.com/superradcompany/microsandbox/pull/1006
Web page

Slim down the msb sandbox process command line (it's very long and hard to read) · Issue #997 · superradcompany/microsandbox · GitHub

https://github.com/superradcompany/microsandbox/issues/997
GitHub advisoryMentions a patch (unverified)

Secret values exposed in world-readable process arguments · Advisory · superradcompany/microsandbox · GitHub

https://github.com/superradcompany/microsandbox/security/advisories/GHSA-m8f5-rh7h-vgg3

Vendor Advisories for CVE-2026-61670(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
rustmicrosandbox @ 0.5.10 (fixes < 0.5.10)—ghsa

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.

Affected Packages

(1 across 1 ecosystem)
crates.io(1)
PackageVulnerable rangeFix by version rangeDependents
microsandbox—
  • every version up to 0.5.10: fixed in 0.5.10
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 43× 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. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-11-01 07:41 UTCGHSA enrichmentGHSA-m8f5-rh7h-vgg3 · GitHub severity MODERATE · GitHub CVSS 6.5
  3. 2026-11-01 07:41 UTCEG score recompute
  4. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  5. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-10-30 09:25 UTCOSV refresh
  7. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-25 14:14 UTCEG score recompute
  13. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-22 20:00 UTCEG score recompute
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-18 03:25 UTCEG score recompute
  20. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-12 15:50 UTCEG score recompute
  24. 2026-10-11 19:34 UTCEG score recompute
  25. 2026-10-11 16:49 UTCEG score recompute
Show 38 more
  1. 2026-10-11 14:11 UTCEG score recompute
  2. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-11 02:46 UTCEG score recompute
  4. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-10-10 00:55 UTCEG score recompute
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-09 00:54 UTCEG score recompute
  8. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-10-08 00:54 UTCEG score recompute
  10. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-07 00:53 UTCEG score recompute
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-06 00:37 UTCEG score recompute
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-05 00:36 UTCEG score recompute
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-04 00:35 UTCEG score recompute
  18. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-03 00:35 UTCEG score recompute
  20. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-02 00:35 UTCEG score recompute
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-01 00:35 UTCEG score recompute
  24. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-09-30 00:24 UTCEG score recompute
  26. 2026-09-28 21:42 UTCEG score recompute
  27. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  28. 2026-09-27 21:42 UTCEG score recompute
  29. 2026-09-26 21:42 UTCEG score recompute
  30. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-09-24 21:29 UTCEG score recompute
  32. 2026-09-22 21:24 UTCEG score recompute
  33. 2026-09-21 21:24 UTCEG score recompute
  34. 2026-09-21 20:58 UTCEG score recompute
  35. 2026-09-19 21:18 UTCEG score recompute
  36. 2026-09-18 21:17 UTCEG score recompute
  37. 2026-09-18 20:50 UTCEG score recomputeFirst assessed: 6.5 MEDIUM
  38. 2026-09-18 20:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-61670?
CVE-2026-61670 is a medium-severity vulnerability; its CVE record was published on September 18, 2026. microsandbox is an easy, fast, local-first microVM runtime and library. Prior to 0.5.10, sdk/rust/lib/runtime/spawn.rs serializes NetworkConfig secret values into the --network-config argument and passes per-sandbox secrets through repeated --env arguments accepted by crates/cli/lib/sandbox_cmd.rs.…
When was the CVE record for CVE-2026-61670 published?
The CVE record for CVE-2026-61670 was published on September 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 September 24, 2026; the record at its source may have been updated since.
Is CVE-2026-61670 actively exploited?
CVE-2026-61670 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-61670?
CVE-2026-61670 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-61670?
A fix for CVE-2026-61670 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-61670 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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