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CVE-2021-27290

nodejs-ssri: Regular expression DoS (ReDoS) when parsing malicious SRI in strict mode

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Severity

Low

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · March 12, 2021

Updated · October 14, 2026

Description

A flaw was found in ssri package. A malicious string provided by an attacker may lead to Regular Expression Denial of Service (ReDoS). This issue only affects consumers using the strict option. The highest threat from this vulnerability is to availability.

Statement

Whilst the OpenShift ServiceMesh (OSSM) servicemesh-grafana and servicemesh-prometheus include the vulnerable ssri library, the vulnerable "strict" option is not used. Similar to OSSM, OpenShift Container Platform (OCP), Red Hat Advance Cluster Management for Kubernetes (RHACM) and OpenShift distributed tracing components include the vulnerable ssri library but the "strict" option is not used. Additionally access to the vulnerable library is protected by OpenShift OAuth what reducing impact by this flaw to LOW. Therefore these OSSM, OCP, RHACM and OpenShift distributed tracing components have been marked as wont-fix and may be addressed in a future updates.

Red Hat Virtualization includes ssri in cockpit-ovirt, ovirt-web-ui and ovirt-engine-ui-extensions, but the vulnerable "strict" option is not used. Additionally access to the vulnerable library is protected by RHV authentication. Therefore the impact of this flaw for RHV has been reduced to LOW and components have been marked as wont-fix and may be addressed in a future update.

Red Hat Quay includes ssri as a dependency of webpack which is only used at build time. The library is not used at runtime, reducing the impact of this vulnerability to low.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-770 · Allocation of Resources Without Limits or Throttling