CVE-2026-12537

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-24. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

Improper Neutralization used in an OS Command in the container launcher in Google Gemini CLI (versions prior to 0.39.1) and run-gemini-cli GitHub Action (versions prior to 0.1.22) on headless CI platforms allows an unprivileged attacker to achieve pre-sandbox host-level code execution a maliciously crafted .gemini/.env file.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 2, 2026

Advisory Details (1)

Auto-updated Jun 25, 2026
Patch available. Sources: github.
github Patch Available

Update to Gemini CLI and run-gemini-cli Trust Model · Advisory · google-github-actions/run-gemini-cli · GitHub

https://github.com/google-github-actions/run-gemini-cli/security/advisories/GHSA-wpqr-6v78-jr5g

Vendor Advisories for CVE-2026-12537(1)

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

Affected Packages

(2 across 2 ecosystems)
GitHub Actions(1)
PackageVulnerable rangeFixed inDependents
google-github-actions/run-gemini-cli—0.1.22—
npm(1)
PackageVulnerable rangeFixed inDependents
@google/gemini-cli0.40.0-preview.20.40.0-preview.3—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 104× 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.

Showing the most recent 100 of 223 total refreshes for this CVE.

  1. 2026-08-25 13:48 UTCEPSS rescore
  2. 2026-08-24 22:02 UTCEG score recompute
  3. 2026-08-24 22:02 UTCGHSA enrichment
  4. 2026-08-24 04:39 UTCGHSA enrichment
  5. 2026-08-23 14:36 UTCGHSA enrichment
  6. 2026-08-23 02:06 UTCEG score recompute
  7. 2026-08-23 02:06 UTCGHSA enrichment
  8. 2026-08-23 00:19 UTCEPSS rescore
  9. 2026-08-22 13:16 UTCEG score recompute
  10. 2026-08-22 13:16 UTCGHSA enrichment
  11. 2026-08-21 23:48 UTCEPSS rescore
  12. 2026-08-21 21:01 UTCGHSA enrichment
  13. 2026-08-21 08:33 UTCEG score recompute
  14. 2026-08-21 08:33 UTCGHSA enrichment
  15. 2026-08-20 22:55 UTCEPSS rescore
  16. 2026-08-20 20:04 UTCGHSA enrichment
  17. 2026-08-20 07:36 UTCEG score recompute
  18. 2026-08-20 07:36 UTCGHSA enrichment
  19. 2026-08-19 17:03 UTCEPSS rescore
  20. 2026-08-19 14:52 UTCGHSA enrichment
  21. 2026-08-19 02:20 UTCEG score recompute
  22. 2026-08-19 02:20 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-17 16:09 UTCEG score recompute
  25. 2026-08-17 16:09 UTCGHSA enrichment
Show 75 more
  1. 2026-08-17 03:41 UTCGHSA enrichment
  2. 2026-08-16 15:13 UTCEG score recompute
  3. 2026-08-16 15:13 UTCGHSA enrichment
  4. 2026-08-16 14:56 UTCEPSS rescore
  5. 2026-08-16 02:45 UTCEG score recompute
  6. 2026-08-16 02:45 UTCGHSA enrichment
  7. 2026-08-16 02:14 UTCEPSS rescore
  8. 2026-08-15 14:17 UTCGHSA enrichment
  9. 2026-08-15 01:48 UTCEG score recompute
  10. 2026-08-15 01:48 UTCGHSA enrichment
  11. 2026-08-15 01:30 UTCEPSS rescore
  12. 2026-08-14 13:20 UTCGHSA enrichment
  13. 2026-08-14 00:52 UTCEG score recompute
  14. 2026-08-14 00:52 UTCGHSA enrichment
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-13 12:24 UTCGHSA enrichment
  17. 2026-08-12 23:56 UTCEG score recompute
  18. 2026-08-12 23:56 UTCGHSA enrichment
  19. 2026-08-12 13:50 UTCEPSS rescore
  20. 2026-08-12 11:29 UTCGHSA enrichment
  21. 2026-08-11 23:00 UTCEG score recompute
  22. 2026-08-11 23:00 UTCGHSA enrichment
  23. 2026-08-11 13:42 UTCEPSS rescore
  24. 2026-08-11 10:33 UTCEG score recompute
  25. 2026-08-11 10:33 UTCGHSA enrichment
  26. 2026-08-10 23:59 UTCEPSS rescore
  27. 2026-08-10 22:04 UTCGHSA enrichment
  28. 2026-08-10 09:35 UTCGHSA enrichment
  29. 2026-08-09 21:08 UTCEG score recompute
  30. 2026-08-09 21:08 UTCGHSA enrichment
  31. 2026-08-09 13:46 UTCEPSS rescore
  32. 2026-08-09 08:40 UTCGHSA enrichment
  33. 2026-08-08 20:12 UTCEG score recompute
  34. 2026-08-08 20:12 UTCGHSA enrichment
  35. 2026-08-08 16:37 UTCEPSS rescore
  36. 2026-08-08 07:43 UTCGHSA enrichment
  37. 2026-08-07 19:15 UTCEG score recompute
  38. 2026-08-07 19:15 UTCGHSA enrichment
  39. 2026-08-07 06:47 UTCGHSA enrichment
  40. 2026-08-06 18:19 UTCEG score recompute
  41. 2026-08-06 18:19 UTCGHSA enrichment
  42. 2026-08-06 13:46 UTCEPSS rescore
  43. 2026-08-06 05:51 UTCEG score recompute
  44. 2026-08-06 05:51 UTCGHSA enrichment
  45. 2026-08-05 19:17 UTCEPSS rescore
  46. 2026-08-05 17:23 UTCGHSA enrichment
  47. 2026-08-05 03:40 UTCGHSA enrichment
  48. 2026-08-04 15:12 UTCEG score recompute
  49. 2026-08-04 15:12 UTCGHSA enrichment
  50. 2026-08-04 15:09 UTCEPSS rescore
  51. 2026-08-04 10:38 UTCEPSS rescore
  52. 2026-08-03 20:25 UTCEG score recompute
  53. 2026-08-03 20:25 UTCGHSA enrichment
  54. 2026-08-03 10:35 UTCEPSS rescore
  55. 2026-08-03 07:57 UTCGHSA enrichment
  56. 2026-08-02 18:06 UTCGHSA enrichment
  57. 2026-08-02 05:38 UTCEG score recompute
  58. 2026-08-02 05:38 UTCGHSA enrichment
  59. 2026-08-02 02:26 UTCEPSS rescore
  60. 2026-08-01 17:10 UTCGHSA enrichment
  61. 2026-08-01 04:42 UTCEG score recompute
  62. 2026-08-01 04:42 UTCGHSA enrichment
  63. 2026-08-01 04:15 UTCEPSS rescore
  64. 2026-07-31 16:08 UTCGHSA enrichment
  65. 2026-07-31 03:34 UTCEG score recompute
  66. 2026-07-31 03:34 UTCGHSA enrichment
  67. 2026-07-30 16:27 UTCEPSS rescore
  68. 2026-07-30 15:04 UTCEG score recompute
  69. 2026-07-30 15:04 UTCGHSA enrichment
  70. 2026-07-30 02:24 UTCEG score recompute
  71. 2026-07-30 02:24 UTCGHSA enrichment
  72. 2026-07-30 01:30 UTCEPSS rescore
  73. 2026-07-29 13:34 UTCGHSA enrichment
  74. 2026-07-29 01:04 UTCEG score recompute
  75. 2026-07-29 01:04 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12537?
CVE-2026-12537 is a high vulnerability published on June 24, 2026. Improper Neutralization used in an OS Command in the container launcher in Google Gemini CLI (versions prior to 0.39.1) and run-gemini-cli GitHub Action (versions prior to 0.1.22) on headless CI platforms allows an unprivileged attacker to achieve pre-sandbox host-level code execution a maliciously…
When was CVE-2026-12537 disclosed?
CVE-2026-12537 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12537 actively exploited?
CVE-2026-12537 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 88.7% of all scored CVEs.
What is the CVSS score of CVE-2026-12537?
CVE-2026-12537 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-12537?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12537, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-12537

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