CVE-2026-33976

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Source
https://cve.org/CVERecord?id=CVE-2026-33976
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33976.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-33976
Aliases
  • GHSA-f42f-phvp-43x5
Published
2026-03-27T21:26:10.127Z
Modified
2026-07-15T01:49:10.170851351Z
Severity
  • 9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CVSS Calculator
Summary
Notesnook vulnerable to RCE via stored XSS in Web Clipper rendering
Details

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-handler attributes such as onload, onclick, or onmouseover execute in the Notesnook origin. In the desktop app, this becomes RCE because Electron is configured with nodeIntegration: true and contextIsolation: false. Version 3.3.11 Web/Desktop and 3.3.17 on Android/iOS patch the issue.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33976.json",
    "cwe_ids": [
        "CWE-79",
        "CWE-94"
    ]
}
References

Affected packages

Git / github.com/streetwriters/notesnook

Affected ranges

Type
GIT
Repo
https://github.com/streetwriters/notesnook
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
00a20dda48e63d04fec7724b8707c3a6b913f673
Fixed
af4638ac508bba747b2048eb862232be14326ccf
Database specific 
{
    "cpe": [
        "cpe:2.3:a:streetwriters:notesnook_desktop:*:*:*:*:*:*:*:*",
        "cpe:2.3:a:streetwriters:notesnook_mobile:*:*:*:*:*:android:*:*",
        "cpe:2.3:a:streetwriters:notesnook_mobile:*:*:*:*:*:iphone_os:*:*"
    ],
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.3.11"
        },
        {
            "fixed": "3.3.17"
        }
    ]
}

Affected versions

2.*
2.2.0-android
2.2.1-android
2.2.2-android
2.2.3-android
2.2.4-android
2.2.5-android
2.2.6-android
2.3.0-android
2.4.0-android
2.4.1-android
2.4.10-android
2.4.11-android
2.4.12-android
2.4.13-android
2.4.14-android
2.4.15-android
2.4.16-android
2.4.17-android
2.4.2-android
2.4.3-android
2.4.4-android
2.4.5-android
2.4.6-android
2.4.7-android
2.4.8-android
2.4.9-android
2.5.0-android
2.5.1-android
2.5.2-android
2.5.3-android
2.5.4-android
2.5.5-android
2.5.6-android
2.6.0-android
2.6.1-android
2.6.10-android
2.6.11-android
2.6.12-android
2.6.14-android
2.6.15-android
2.6.16-android
2.6.17-android
2.6.18-android
2.6.2-android
2.6.3-android
2.6.4-android
2.6.5-android
2.6.6-android
2.6.7-android
2.6.8-android
2.6.9-android
3.*
3.0.0-android
3.0.0-beta-android
3.0.1-android
3.0.1-beta-android
3.0.10-android
3.0.10-beta-android
3.0.11-android
3.0.12-android
3.0.12-beta-android
3.0.13-android
3.0.13-beta-android
3.0.14-beta-android
3.0.15-android
3.0.15-beta-android
3.0.16-android
3.0.16-beta-android
3.0.17-android
3.0.17-beta-android
3.0.18-android
3.0.2-android
3.0.2-beta-android
3.0.20-android
3.0.21-android
3.0.22-android
3.0.23-android
3.0.24-android
3.0.25-android
3.0.26-android
3.0.27-android
3.0.28-android
3.0.29-android
3.0.3-android
3.0.3-beta-android
3.0.30-android
3.0.31-android
3.0.32-android
3.0.4-android
3.0.4-beta-android
3.0.5-android
3.0.5-beta-android
3.0.6-android
3.0.6-beta-android
3.0.7-android
3.0.7-beta-android
3.0.8-android
3.0.8-beta-android
3.0.9-android
3.0.9-beta-android
3.1.0-android
3.1.0-beta.0-beta-android
3.1.0-beta.1-beta-android
3.1.0-beta.2-beta-android
3.1.0-beta.3-beta-android
3.1.1-android
3.2.0-android
3.2.0-beta.0-beta-android
3.2.0-beta.1-beta-android
3.2.0-beta.2-beta-android
3.2.0-beta.3-beta-android
3.2.0-beta.4-beta-android
3.2.1-android
3.2.10-android
3.2.11-android
3.2.12-android
3.2.2-android
3.2.3-android
3.2.4-android
3.2.5-android
3.2.7-android
3.2.8-android
3.2.9-android
3.3.0-android
3.3.1-android
3.3.10-beta.0-beta-android
3.3.10-beta.3-beta-android
3.3.10-beta.4-beta-android
3.3.10-beta.5-beta-android
3.3.10-beta.6-beta-android
3.3.13-beta.1-beta-android
3.3.14-android
3.3.15-android
3.3.16-android
3.3.19-android
3.3.2-android
3.3.21-android
3.3.3-android
3.3.4-android
3.3.5-android
3.3.9-android
v2.*
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.3.0
v2.4.0
v2.4.1
v2.4.10
v2.4.11
v2.4.2
v2.4.3
v2.4.4
v2.4.5
v2.4.6
v2.4.7
v2.4.8
v2.4.9
v2.5.0
v2.5.1
v2.5.2
v2.5.3
v2.5.4
v2.5.5
v2.5.6
v2.5.7
v2.5.8
v2.6.0
v2.6.1
v2.6.10
v2.6.11
v2.6.12
v2.6.13
v2.6.14
v2.6.15
v2.6.16
v2.6.17
v2.6.2
v2.6.3
v2.6.4
v2.6.5
v2.6.6
v2.6.7
v2.6.8
v2.6.9
v3.*
v3.0.0
v3.0.0-beta
v3.0.1
v3.0.10
v3.0.11
v3.0.12
v3.0.13
v3.0.14
v3.0.15
v3.0.16
v3.0.17
v3.0.18
v3.0.2
v3.0.20
v3.0.21
v3.0.22
v3.0.23
v3.0.24
v3.0.25
v3.0.26
v3.0.27
v3.0.28
v3.0.29
v3.0.3
v3.0.30
v3.0.31
v3.0.32
v3.0.4
v3.0.5
v3.0.6
v3.0.7
v3.0.8
v3.0.9
v3.0.9-beta
v3.1.0
v3.1.0-beta.2
v3.1.0-beta.3
v3.1.1
v3.2.0
v3.2.2
v3.2.3
v3.2.4
v3.3.1
v3.3.10
v3.3.11
v3.3.12
v3.3.13
v3.3.14
v3.3.15
v3.3.16
v3.3.2
v3.3.3
v3.3.4
v3.3.5
v3.3.6
v3.3.7
v3.3.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33976.json"