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HIGH

CVE-2021-27290

CVSS v3

7.5

HIGH

EPSS Score

4.7 %

exploit probability, as of 2026-10-20

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • ssrinpmfrom 8.0.0 · fixed in 8.0.1
  • nodejs-nodemonAlmaLinux:8all versions · fixed in 2.0.3-1.module_el8.4.0+2521+c668cc9f
  • nodejs-packagingAlmaLinux:8all versions · fixed in 23-3.module_el8.4.0+2522+3bd42762

Vendor advisories

  • CVE-2021-27290 Red Hat Product Security200 products fixed · 52 known affected

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

    openshift-logging/kibana6-rhel8 as a component of Logging Subsystem for Red Hat OpenShift · kiali as a component of OpenShift Service Mesh 2.0 · kiali.src as a component of OpenShift Service Mesh 2.0

  • ICSA-22-069-09 CISA1 known affected

    Siemens SINEC INS

    SINEC INS

  • SSA-389290 Siemens ProductCERT1 known affected

    SSA-389290: Third-Party Component Vulnerabilities in SINEC INS

    SINEC INS

  • RHSA-2021:3638 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: nodejs:12 security and bug fix update

  • RHSA-2021:3639 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: nodejs:12 security and bug fix update

  • RHSA-2021:3074 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: nodejs:14 security, bug fix, and enhancement update

3 more advisories

Full record on NVD

Description

ssri 5.2.2-8.0.0, fixed in 8.0.1, processes SRIs using a regular expression which is vulnerable to a denial of service. Malicious SRIs could take an extremely long time to process, leading to denial of service. This issue only affects consumers using the strict option.

Technical details

Published
2021-03-12

Frequently asked questions

What is CVE-2021-27290?

ssri 5.2.2-8.0.0, fixed in 8.0.1, processes SRIs using a regular expression which is vulnerable to a denial of service. Malicious SRIs could take an extremely long time to process, leading to denial of service. This issue only affects consumers using the strict option.

Is CVE-2021-27290 actively exploited?

Active exploitation of CVE-2021-27290 has not been confirmed. Its EPSS score was 4.7% on 2026-10-20, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-27290?

CVE-2021-27290 has a CVSS v3 base score of 7.5 (HIGH severity).

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