marimo before 0.23.15 contains a code injection vulnerability in the notebook configuration handler that allows attackers to execute arbitrary commands by supplying a crafted MCP server entry with an attacker-controlled command value embedded in a notebook. When the notebook is opened in edit mode, marimo launches the specified command as a local subprocess before any notebook cell is executed, requiring no authentication or cell execution to trigger the vulnerability.
CVE-2026-75149
HIGHPre-NVD 8.88.8—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-19. a secondary CVSS source baseline 8.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(high)
- EG Risk
- 44(Track)EG Risk 44/100SSVC: 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 computedSeverity88% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 1%
- EPSS %ILE
- 48%
- KEV
- Not listed
Published
August 19, 2026
Last Modified
August 19, 2026
Advisory Details (4)
Auto-updated Aug 19, 2026Patch available. Sources: github_release, github_pr, github_commit.
generic
marimo < 0.23.15 Code Injection via MCP Server Configuration | Advisories | VulnCheck
https://www.vulncheck.com/advisories/marimo-code-injection-via-mcp-server-configurationgithub_commit Patch Available
commit 1a21bd71e258 (marimo-team/marimo)
Patch available: marimo-team/marimo 0.23.15 (contains commit 1a21bd71e258)
https://github.com/marimo-team/marimo/commit/1a21bd71e258438d2511136b5edacc94c08855f4github_pr Patch Available
fix: additional pep 723 sanitization
Patch available: marimo-team/marimo 0.23.15 (PR #10281 merged 2026-07-23)
https://github.com/marimo-team/marimo/pull/10281github_release Patch Available
0.23.15
Patch available: marimo-team/marimo 0.23.15
https://github.com/marimo-team/marimo/releases/tag/0.23.15Vendor Advisories for CVE-2026-75149(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× 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.
- 2026-08-20 22:56 UTCEPSS rescore
- 2026-08-20 18:56 UTCGHSA enrichment
- 2026-08-20 06:43 UTCEG score recompute
- 2026-08-20 06:43 UTCGHSA enrichment
- 2026-08-19 18:29 UTCEG score recompute
- 2026-08-19 17:53 UTCEG score recompute
- 2026-08-19 17:52 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-94
- CVE-2003-1432EG 10.0EPSS p94HIGH
- CVE-2002-0495EG 10.0EPSS p96HIGH
- CVE-1999-0702EG 10.0EPSS p98HIGH
- CVE-1999-0509EG 10.0EPSS p98HIGH
- CVE-2006-1318EG 9.3EPSS p97HIGH
- CVE-2006-1301EG 9.3EPSS p95HIGH
- CVE-2006-1308EG 9.3EPSS p95HIGH
- CVE-2006-1309EG 9.3EPSS p95HIGH
- CVE-2006-1304EG 9.3EPSS p96HIGH
- CVE-2006-1306EG 9.3EPSS p95HIGH
Frequently asked(5)
What is CVE-2026-75149?
CVE-2026-75149 is a high vulnerability published on August 19, 2026. marimo before 0.23.15 contains a code injection vulnerability in the notebook configuration handler that allows attackers to execute arbitrary commands by supplying a crafted MCP server entry with an attacker-controlled command value embedded in a notebook. When the notebook is opened in edit mode,…
When was CVE-2026-75149 disclosed?
CVE-2026-75149 was first published in the National Vulnerability Database on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75149 actively exploited?
CVE-2026-75149 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.2% of all scored CVEs.
What is the CVSS score of CVE-2026-75149?
CVE-2026-75149 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-75149?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75149, 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
Explore the affected products and dependency analysis for CVE-2026-75149
Is Your Infrastructure Affected by CVE-2026-75149?
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