CVE-2021-35514

Code injection in Narou

9.8 CriticalFix available

Narou (aka Narou.rb) before 3.8.0 allows Ruby Code Injection via the title name or author name of a novel.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.44%Up 0.8 points since Jun 29, 2021

What each source reports

NVD Score used 9.8

Narou (aka Narou.rb) before 3.8.0 allows Ruby Code Injection via the title name or author name of a novel.

Record: CVE-2021-35514
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-94
Updated: 2026-11-02

CVE List No score

Narou (aka Narou.rb) before 3.8.0 allows Ruby Code Injection via the title name or author name of a novel.

Record: CVE-2021-35514
Updated: 2026-11-02

EUVDEUVD-2021-1469 No score

Narou (aka Narou.rb) before 3.8.0 allows Ruby Code Injection via the title name or author name of a novel.

Record: EUVD-2021-1469
Updated: 2026-11-03

GitHub AdvisoriesGHSA-gwrj-88fp-5m36 8.5

Code injection in Narou

Narou (aka Narou.rb) before 3.8.0 allows Ruby Code Injection via the title name or author name of a novel.

Record: GHSA-gwrj-88fp-5m36
CVSS 3.1: 8.5 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Weakness: CWE-94
Updated: 2026-11-02

OSVGHSA-gwrj-88fp-5m36 8.5

Code injection in Narou

Narou (aka Narou.rb) before 3.8.0 allows Ruby Code Injection via the title name or author name of a novel.

Record: GHSA-gwrj-88fp-5m36
CVSS 3.1: 8.5 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Weakness: CWE-94
Updated: 2026-11-02

Affected products

narou project narou

Affected packages

Affected packages
Package	Affected	Fixed
`narou` RubyGems	before 3.8.0	3.8.0
`narou` RubyGems	before 3.8.0, plus listed versions 1.0.01.0.11.0.21.1.01.1.0.rc1 Show 45 moreShow less 1.1.0.rc21.1.11.1.21.1.2.11.2.01.2.11.2.21.2.31.2.41.2.51.2.5.11.2.5.rc11.2.5.rc21.2.61.2.71.2.81.2.91.2.9.rc11.3.01.3.0.11.3.11.3.21.3.31.3.41.3.51.3.5.11.4.01.4.11.4.1.11.4.2.rc11.4.2.rc21.4.31.4.41.4.51.4.61.5.01.5.0.11.5.0.21.5.11.5.101.5.10.11.5.111.5.21.5.2.11.5.3	3.8.0

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-35514 is a critical vulnerability (CVSS 9.8) in Narou Project Narou, published June 28, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.44%, the 73rd percentile. Fixed in narou 3.8.0.

References

This page doesn't list everything

Left out here: 96 versions. The JSON record has them.