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CVE-2026-33976

Notesnook is a note-taking app. Prior to version 3.3.11 on Web/Desktop and 3.3.17 on Android/iOS, a stored XSS in the Web Clipper rendering flow can be escalated to remote code execution in the desktop app. The root cause is that the clipper preserves attacker-controlled attributes from the source page’s root element and stores them inside web-clip HTML. When the clip is later opened, Notesnook renders that HTML into a same-origin, unsandboxed iframe using `contentDocument.write(...)`. Event-han
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3e37b8d489c725d3f8c1158cb58c4a3b487d8ab22bd2c064a93aaa7f0c95fddf
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"product":"Notesnook Web/Desktop","vendor":"streetwriters","versions":[{"status":"affected","version":"< 3.3.11"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/affected/0

{"product":"Notesnook iOS/Android","vendor":"streetwriters","versions":[{"status":"affected","version":"< 3.3.17"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/affected/1
cwe · 2 assertions

{"cweId":"CWE-94","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-79","description":"CWE-79: 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:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

2 source assertions
{"product":"Notesnook Web/Desktop","vendor":"streetwriters","versions":[{"status":"affected","version":"< 3.3.11"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/affected/0
{"product":"Notesnook iOS/Android","vendor":"streetwriters","versions":[{"status":"affected","version":"< 3.3.17"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.7,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-94","description":"CWE-94: Improper Control of Generation of Code ('Code Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-79","description":"CWE-79: 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:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/streetwriters/notesnook/security/advisories/GHSA-f42f-phvp-43x5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/streetwriters/notesnook/security/advisories/GHSA-f42f-phvp-43x5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efcac4a49b105ea373eb862ee6d4feb262b0910363eed130f19a06ac51ff8348 · sha256:4588888da6682d54… · /containers/cna/references/0

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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