Vulnerability-Lookup

CVE-2026-33955 (GCVE-0-2026-33955)

Vulnerability from cvelistv5 – Published: 2026-03-27 21:27 – Updated: 2026-04-03 13:02

Title

Notesnook vulnerable to RCE via stored XSS in Note History diff viewer

Summary

Notesnook is a note-taking app. Prior to version 3.3.11 on Web/Desktop, a cross-site scripting vulnerability stored in the note history comparison viewer can escalate to remote code execution in a desktop application. The issue is triggered when an attacker-controlled note header is displayed using `dangerouslySetInnerHTML` without secure handling. When combined with the full backup and restore feature in the desktop application, this becomes remote code execution because Electron is configured with `nodeIntegration: true` and `contextIsolation: false`. Version 3.3.11 patches the issue.

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-03 03:55 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/streetwriters/notesnook/securi…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
streetwriters	Notesnook Web/Desktop	Affected: < 3.3.11	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-33955

Vulnerability from fkie_nvd - Published: 2026-03-27 22:16 - Updated: 2026-06-17 10:38

Severity

8.6 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/streetwriters/notesnook/security/advisories/GHSA-45g3-cv93-q59v	Exploit, Vendor Advisory

Impacted products

	Vendor	Product	Version
	streetwriters	notesnook_desktop	*

JSON

To clipboard

{
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        {
          "product": "Notesnook Web/Desktop",
          "vendor": "streetwriters",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.3.11"
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          ]
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    }
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.