CVE-2023-51277: nbviewer-app (aka Jupyter Notebook Viewer) before 0.1.6 has the get-task-allow entitlement for release
Source CVE Database V5
Not known to be exploited · CVSS 9.8 Critical : upgrade to 0.1.6 as a priority.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 1.0% chance of exploitation in 30 days – higher than 64% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.1.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 5 Jan 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade tuxu/nbviewer-app to 0.1.6.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
GitHubtuxu/nbviewer-apppkg:github/tuxu/nbviewer-appOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
To mitigate CVE-2023-51277, European organizations should: 1) Immediately upgrade nbviewer-app to version 0.1.6 or later, where the 'get-task-allow' entitlement has been removed from release builds. 2) Audit existing deployments of nbviewer-app and related Jupyter Notebook tools to identify vulnerable versions. 3) Implement strict application whitelisting and sandboxing to limit the impact of potential exploitation. 4) Monitor network and system logs for unusual activity indicative of exploitation attempts, such as unexpected process debugging or code injection behaviors. 5) Employ endpoint detection and response (EDR) solutions capable of detecting privilege escalation or task port access anomalies. 6) Restrict network exposure of nbviewer-app instances, ideally limiting access to trusted internal networks or via VPN with strong authentication. 7) Educate developers and system administrators about the risks of entitlements like 'get-task-allow' in production environments to prevent similar misconfigurations. 8) Regularly review and update security policies governing the deployment of open-source tools and their configurations.
Description
nbviewer-app (aka Jupyter Notebook Viewer) before 0.1.6 has the get-task-allow entitlement for release builds.
References
- developer.apple.com/documentation/security/notarizing_macos_software_before_distribution/resolving_common_notarization_issues (opens in a new tab)
- github.com/tuxu/nbviewer-app/commit/dc1e4ddf64c78e13175a39b076fa0646fc62e581 (opens in a new tab)
- github.com/tuxu/nbviewer-app/compare/0.1.5...0.1.6 (opens in a new tab)
- youtube.com/watch?v=c0nawqA_bdI (opens in a new tab)