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CVE-2026-54386

marimo before 0.23.9 contains a reflected cross-site scripting vulnerability in the notebook page that allows unauthenticated attackers to inject arbitrary JavaScript by exploiting improper escaping of single quotes in the file query parameter reflected into an inline JavaScript string literal. Attackers can craft a malicious link with a payload beginning with __new__ to bypass the 404 check and inject JavaScript into the page, which executes without Content-Security-Policy restrictions in the o
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cbb9d275da58291d58bdde9860266c3cd8d3329fc670b34a3d1657d27947dc24
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageURL":"pkg:github/marimo-team/marimo","product":"marimo","repo":"https://github.com/marimo-team/marimo","vendor":"marimo-team","versions":[{"lessThan":"0.23.9","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"tags":["patch"],"url":"https://github.com/marimo-team/marimo/commit/fdd55c8cf6260ae23bb411dc9d9269def5cf75d6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/references/2
{"tags":["issue-tracking"],"url":"https://github.com/marimo-team/marimo/pull/9789"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/references/1
{"tags":["release-notes"],"url":"https://github.com/marimo-team/marimo/releases/tag/0.23.9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/marimo-xss-via-file-query-parameter-in-assets-py"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ef85563975cab13624026df6c6dc82ebd69efdd7ccf062422dbefb222a5760ac · sha256:3e637f0cd92cf79b… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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