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
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
7.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

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%
EPSS PROB
0.2%
EPSS %ILE
10th
KEV
Not listed

Published

June 24, 2026

Last Modified

July 2, 2026

Advisory Details (1)

Auto-updated Jun 25, 2026
Patch available. Sources: github.
githubMentions a patch (unverified)

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 rangeFix by version rangeDependents
google-github-actions/run-gemini-cliv0.1.21 ... v0.1.1 (21 versions)f77273f4c914e4bf38440cf36a0369cb64a37489 (one range)—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@google/gemini-cli0.40.0-preview.2
  • every version up to 0.39.1: fixed in 0.39.1
  • 0.40.0-preview.2 up to 0.40.0-preview.3: fixed in 0.40.0-preview.3
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 29× 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 268 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Same product

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npm:@google/gemini-cli

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 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 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-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?
A fix for CVE-2026-12537 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-12537 are linked in the Vendor Advisories panel on this page.

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