CVE-2026-28279

HIGHNVD 8.48.4
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.4 under NVD CVSS v3. EPSS exploit probability: 1.0% (61st percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 7.3 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-02-28) is not newer than that change (2026-06-17), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2026-8922 (ENISA EUVD) · GHSA-rchw-322g-f7rm (GitHub Security Advisories)Source: ENISA EUVD

8.4EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.0%CVSS: 8.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

osctrl is an osquery management solution. Prior to version 0.5.0, an OS command injection vulnerability exists in the osctrl-admin environment configuration. An authenticated administrator can inject arbitrary shell commands via the hostname parameter when creating or editing environments. These commands are embedded into enrollment one-liner scripts generated using Go's text/template package (which does not perform shell escaping) and execute on every endpoint that enrolls using the compromised environment. An attacker with administrator access can achieve remote code execution on every endpoint that enrolls using the compromised environment. Commands execute as root/SYSTEM (the privilege level used for osquery enrollment) before osquery is installed, leaving no agent-level audit trail. This enables backdoor installation, credential exfiltration, and full endpoint compromise. This is fixed in osctrl v0.5.0. As a workaround, restrict osctrl administrator access to trusted personnel, review existing environment configurations for suspicious hostnames, and/or monitor enrollment scripts for unexpected commands.

CVSS v3
8.4
EG Score
8.4HIGHmedium confidence
EG Risk
38
EG Risk 38/100

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)
Severity84% × 45%
Impact severity (EG Severity): CVSS 8.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.0% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
1.0%
EPSS %ILE
61st
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 (8.4): severity, escalated by confirmed exploitation. This CVE's 8.4 is its impact severity (EG Severity), not escalated.

EG Severity
8.4 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
1.0% 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 low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 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 low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; 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 total (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

February 26, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 2, 2026
Patch available. Sources: github_pr, github.
GitHub advisoryMentions a patch (unverified)

OS Command Injection via Environment Configuration in `osctrl-admin` · Advisory · jmpsec/osctrl · GitHub

https://github.com/jmpsec/osctrl/security/advisories/GHSA-rchw-322g-f7rm
GitHub pull request

Filter hostname on environment edit action

Fix merged in jmpsec/osctrl PR #780 on 2026-02-23 — awaiting tagged release

https://github.com/jmpsec/osctrl/pull/780
GitHub pull request

Prevent unsanitized input when creating new environments in `osctrl-admin`

Fix merged in jmpsec/osctrl PR #777 on 2026-02-22 — awaiting tagged release

https://github.com/jmpsec/osctrl/pull/777

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
gogithub.com/jmpsec/osctrl @ 0.5.0 (fixes < 0.5.0)—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)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/jmpsec/osctrl—
  • every version up to 0.5.0: fixed in 0.5.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 41× 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.

Showing the most recent 95 of 107 refreshes on record for this CVE.

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. 5 repeat rows among the latest 100 are merged into the row they repeat. The 12 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:44 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  2. 2026-11-01 07:55 UTCGHSA enrichmentGHSA-rchw-322g-f7rm · GitHub severity HIGH · GitHub CVSS 7.3
  3. 2026-11-01 07:55 UTCEG score recompute
  4. 2026-10-31 16:32 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  5. 2026-10-30 23:37 UTCEG score recompute
  6. 2026-10-30 16:34 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  7. 2026-10-29 16:33 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  8. 2026-10-28 16:32 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  10. 2026-10-26 16:31 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  12. 2026-10-25 14:38 UTCEG score recompute
  13. 2026-10-24 16:32 UTCEPSS rescoreEPSS 1.3% · 71st percentile
  14. 2026-10-24 07:59 UTCEG score recompute
  15. 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  16. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  17. 2026-10-21 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  18. 2026-10-20 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  19. 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  20. 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  21. 2026-10-18 03:50 UTCEG score recompute
  22. 2026-10-17 16:33 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  23. 2026-10-17 16:17 UTCEG score recompute
  24. 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.2% · 67th percentile
  25. 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.2% · 67th percentile
Show 70 more
  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  4. 2026-10-12 16:16 UTCEG score recompute
  5. 2026-10-11 19:59 UTCEG score recompute
  6. 2026-10-11 17:12 UTCEG score recompute
  7. 2026-10-11 14:43 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  11. 2026-10-09 05:55 UTCOSV refresh
  12. 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  13. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  15. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  16. 2026-10-04 23:21 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  18. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  22. 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  24. 2026-09-19 13:02 UTCOSV refresh
  25. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.9% · 58th percentile
  26. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  27. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  28. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  29. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  30. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  31. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  32. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  33. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  34. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  35. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  36. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  37. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  38. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  39. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  40. 2026-08-31 16:34 UTCOSV refresh
  41. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  42. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  43. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  44. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  45. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.9% · 57th percentile
  46. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  47. 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  48. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  49. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  50. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  51. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  52. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  53. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  54. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  55. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  56. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  57. 2026-08-14 08:52 UTCEG score recompute
  58. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  59. 2026-08-13 00:51 UTCEG score recompute
  60. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  61. 2026-08-11 23:40 UTCEG score recompute
  62. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  63. 2026-08-11 06:14 UTCEG score recompute
  64. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  65. 2026-08-09 20:16 UTCEG score recompute
  66. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  67. 2026-08-09 08:32 UTCEG score recompute
  68. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.9% · 56th percentile
  69. 2026-08-07 20:34 UTCEG score recompute
  70. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.9% · 56th percentile

Related CVEs(same product + same CWE)

Same product

1 shown

Go:github.com/jmpsec/osctrl

Frequently asked(5)

What is CVE-2026-28279?
CVE-2026-28279 is a high-severity vulnerability; its CVE record was published on February 26, 2026. osctrl is an osquery management solution. Prior to version 0.5.0, an OS command injection vulnerability exists in the osctrl-admin environment configuration. An authenticated administrator can inject arbitrary shell commands via the hostname parameter when creating or editing environments. These…
When was the CVE record for CVE-2026-28279 published?
The CVE record for CVE-2026-28279 was published on February 26, 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 June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-28279 actively exploited?
CVE-2026-28279 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (61st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-28279?
CVE-2026-28279 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-28279?
A fix for CVE-2026-28279 is available: update to the fixed version the vendor names in its advisory.

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