CVE-2018-7651

Regular Expression Denial of Service in ssri

5.9 MediumFix available

index.js in the ssri module before 5.2.2 for Node.js is prone to a regular expression denial of service vulnerability in strict mode functionality via a long base64 hash string.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.71%Up 0.7 points since Apr 14, 2021

What each source reports

NVD Score used 5.9

index.js in the ssri module before 5.2.2 for Node.js is prone to a regular expression denial of service vulnerability in strict mode functionality via a long base64 hash string.

Record: CVE-2018-7651
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-400
Updated: 2026-11-02

CVE List No score

index.js in the ssri module before 5.2.2 for Node.js is prone to a regular expression denial of service vulnerability in strict mode functionality via a long base64 hash string.

Record: CVE-2018-7651
Updated: 2026-11-02

EUVDEUVD-2018-0168 No score

index.js in the ssri module before 5.2.2 for Node.js is prone to a regular expression denial of service vulnerability in strict mode functionality via a long base64 hash string.

Record: EUVD-2018-0168
Updated: 2026-11-03

GitHub AdvisoriesGHSA-325j-24f4-qv5x 5.9

Regular Expression Denial of Service in ssri

Version of ssri prior to 5.2.2 are vulnerable to regular expression denial of service (ReDoS) when using strict mode.

Recommendation

Update to version 5.2.2 or later.

Record: GHSA-325j-24f4-qv5x
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400
Updated: 2026-11-02

OSV 5.9

index.js in the ssri module before 5.2.2 for Node.js is prone to a regular expression denial of service vulnerability in strict mode functionality via a long base64 hash string.

Record: CVE-2018-7651
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-7651 5.9

index.js in the ssri module before 5.2.2 for Node.js is prone to a regular expression denial of service vulnerability in strict mode functionality via a long base64 hash string.

Record: DEBIAN-CVE-2018-7651
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVGHSA-325j-24f4-qv5x 5.9

Regular Expression Denial of Service in ssri

Version of ssri prior to 5.2.2 are vulnerable to regular expression denial of service (ReDoS) when using strict mode.

Recommendation

Update to version 5.2.2 or later.

Record: GHSA-325j-24f4-qv5x
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-7651 5.9

index.js in the ssri module before 5.2.2 for Node.js is prone to a regular expression denial of service vulnerability in strict mode functionality via a long base64 hash string.

Record: UBUNTU-CVE-2018-7651
CVSS 3.0: 5.9 MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

ssri project ssri

Affected packages

Affected packages
Package	Affected	Fixed
`ssri` npm	before 5.2.2	5.2.2
`node-ssri` Debian:12	before 5.2.4-1	5.2.4-1
`node-ssri` Debian:13	before 5.2.4-1	5.2.4-1
`node-ssri` Debian:14	before 5.2.4-1	5.2.4-1
`node-ssri` Ubuntu:18.04:LTS	All versions, plus listed versions 5.0.0-1	None known

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-2018-7651 is a medium vulnerability (CVSS 5.9) in Ssri Project Ssri, published March 4, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.71%, the 77th percentile. Fixed in ssri 5.2.2.

References

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