CVE-2026-12545

MEDIUMPre-NVD 6.76.7
EchelonGraph scoreMEDIUM confidence

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

Score 6.7 from GitHub Security Advisory published 2026-10-01. A secondary CVSS source baseline 6.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2026-90968 (ENISA EUVD) · GHSA-q4vv-h3wg-pwgx (GitHub Security Advisories)Source: ENISA EUVD

6.7EG
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: 0.5%CVSS: 6.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in rubygem-hammer_cli. A command injection vulnerability exists in Hammer CLI and the Railties (Ruby on Rails) component distributed with Satellite due to the insecure interpolation of the $EDITOR environment variable into the Ruby system() method. By passing a single interpolated string to system(), the application invokes a system shell (/bin/sh) that interprets shell metacharacters (e.g., ;, |, &).

CVSS v3
6.7
EG Score
6.7MEDIUMmedium confidence
EG Risk
30
EG Risk 30/100

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)
Severity67% × 45%
Impact severity (EG Severity): CVSS 6.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 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
0.5%
EPSS %ILE
44th
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 (6.7): severity, escalated by confirmed exploitation. This CVE's 6.7 is its impact severity (EG Severity), not escalated.

EG Severity
6.7 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% 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

October 1, 2026

Last Modified

October 7, 2026

Advisory Details (3)

Auto-updated Oct 1, 2026
Patch available. Sources: redhat.
Red Hat

2489993 – (CVE-2026-12545) CVE-2026-12545 rubygem-hammer_cli: command injection via insecure editor invocation

https://bugzilla.redhat.com/show_bug.cgi?id=2489993
Red HatMentions a patch (unverified)

CVE-2026-12545 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-12545
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:74503

Vendor Advisories for CVE-2026-12545(5)

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

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrubygem-hammer_cli-0:3.18.0-2.el9sat2026-10-01redhat
redhatrubygem-hammer_cli-0:3.16.0-2.el9sat2026-10-01redhat
redhatrubygem-hammer_cli-0:3.12.0-2.el9sat2026-10-01redhat
redhatrubygem-hammer_cli-0:3.14.0-2.el9sat2026-10-01redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 72× 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.

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. 4 repeat rows among the latest 93 are merged into the row they repeat.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-10-31 18:34 UTCEG score recompute
  3. 2026-10-31 18:34 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  4. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  6. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  7. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  11. 2026-10-25 14:49 UTCEG score recompute
  12. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-23 07:16 UTCEG score recompute
  15. 2026-10-23 07:16 UTCVendor advisory
  16. 2026-10-23 07:16 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  17. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  19. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-10-18 05:04 UTCEG score recompute
  23. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
Show 64 more
  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  3. 2026-10-12 16:36 UTCEG score recompute
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  5. 2026-10-12 03:38 UTCVendor advisory
  6. 2026-10-12 03:37 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  7. 2026-10-11 20:12 UTCEG score recompute
  8. 2026-10-11 18:24 UTCEG score recompute
  9. 2026-10-11 14:57 UTCEG score recompute
  10. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  11. 2026-10-11 04:21 UTCEG score recompute
  12. 2026-10-11 04:21 UTCVendor advisory
  13. 2026-10-11 04:20 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  14. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  15. 2026-10-10 05:08 UTCEG score recompute
  16. 2026-10-10 05:08 UTCVendor advisory
  17. 2026-10-10 05:07 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  18. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  19. 2026-10-09 05:55 UTCEG score recompute
  20. 2026-10-09 05:55 UTCVendor advisory
  21. 2026-10-09 05:55 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  22. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  23. 2026-10-08 06:42 UTCEG score recompute
  24. 2026-10-08 06:42 UTCVendor advisory
  25. 2026-10-08 06:42 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  26. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  27. 2026-10-07 07:29 UTCEG score recompute
  28. 2026-10-07 07:29 UTCVendor advisory
  29. 2026-10-07 07:29 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  30. 2026-10-07 06:23 UTCEG score recompute
  31. 2026-10-07 06:23 UTCVendor advisory
  32. 2026-10-07 06:23 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  33. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  34. 2026-10-06 15:14 UTCEG score recompute
  35. 2026-10-06 15:14 UTCVendor advisory
  36. 2026-10-06 15:14 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  37. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  38. 2026-10-05 15:59 UTCEG score recompute
  39. 2026-10-05 15:59 UTCVendor advisory
  40. 2026-10-05 15:59 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  41. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  42. 2026-10-04 16:46 UTCVendor advisory
  43. 2026-10-04 16:46 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  44. 2026-10-03 17:33 UTCEG score recompute
  45. 2026-10-03 17:33 UTCVendor advisory
  46. 2026-10-03 17:33 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  47. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  48. 2026-10-02 18:20 UTCEG score recompute
  49. 2026-10-02 18:20 UTCVendor advisory
  50. 2026-10-02 18:20 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  51. 2026-10-02 17:47 UTCEG score recompute
  52. 2026-10-02 17:47 UTCVendor advisory
  53. 2026-10-02 17:47 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  54. 2026-10-02 00:25 UTCEG score recompute
  55. 2026-10-02 00:25 UTCVendor advisory
  56. 2026-10-02 00:25 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  57. 2026-10-01 23:53 UTCEG score recompute
  58. 2026-10-01 23:53 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  59. 2026-10-01 20:41 UTCEG score recompute
  60. 2026-10-01 20:40 UTCGHSA enrichmentGHSA-q4vv-h3wg-pwgx · GitHub CVSS 6.7
  61. 2026-10-01 18:30 UTCEG score recompute
  62. 2026-10-01 17:47 UTCEG score recompute
  63. 2026-10-01 17:21 UTCEG score recomputeFirst assessed: 6.7 MEDIUM
  64. 2026-10-01 17:20 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-12545?
CVE-2026-12545 is a medium-severity vulnerability; its CVE record was published on October 1, 2026. A flaw was found in rubygem-hammer_cli. A command injection vulnerability exists in Hammer CLI and the Railties (Ruby on Rails) component distributed with Satellite due to the insecure interpolation of the $EDITOR environment variable into the Ruby system() method. By passing a single interpolated…
When was CVE-2026-12545 made public?
CVE-2026-12545 was made public on October 1, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on October 1, 2026. EchelonGraph's copy of the record carries a last-modified date of October 7, 2026; the record at its source may have been updated since.
Is CVE-2026-12545 actively exploited?
CVE-2026-12545 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-12545?
CVE-2026-12545 has a CVSS base score of 6.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-12545?
A fix for CVE-2026-12545 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-12545 are linked in the Vendor Advisories panel on this page.

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