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Fencer Vulns
high 7.5

CVE-2021-27290 json

Regular Expression Denial of Service (ReDoS)

published 2021-03-12 5 y ago modified 2026-06-17 4 mo ago also GHSA-vx3p-948g-6vhq , EUVD-2021-0713

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.7%
EPSS 4.7% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm ssri 6.0.2, 7.1.1, 8.0.1
  • ssri_project ssri 6.0.2, 8.0.1
  • siemens sinec_infrastructure_network_services 1.0.1.1
  • node-ssri Debian 14, Debian 13, Debian 12 8.0.1-1

debian advisories DEBIAN-CVE-2021-27290

  • nodejs-packaging RHEL 8, RHEL 8.2 EUS, RHEL 8.1 EUS 17-3.module+el8.1.0+3369+37ae6a45
  • npm RHEL 8 1:6.14.13-1.12.22.3.2.module+el8.4.0+11732+c668cc9f
  • nodejs RHEL 8 1:12.22.3-2.module+el8.4.0+11732+c668cc9f
  • nodejs-nodemon RHEL 8 2.0.3-1.module+el8.4.0+11732+c668cc9f
  • nodejs-full-i18n RHEL 8 1:12.22.3-2.module+el8.4.0+11732+c668cc9f
  • rh-nodejs14-nodejs RHEL 3 SOFTWARE_COLLECTIONS 14.17.2-1.el7
  • rh-nodejs14-nodejs-nodemon RHEL 3 SOFTWARE_COLLECTIONS 2.0.3-2.el7
  • rh-nodejs14-npm RHEL 3 SOFTWARE_COLLECTIONS 6.14.13-14.17.2.1.el7

red hat advisories RHSA-2021:3639RHSA-2021:3638RHSA-2021:3073RHSA-2021:2932RHSA-2021:2931RHSA-2021:3074

  • nodejs8 SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +10 more 8.17.0-3.47.2
  • nodejs-common SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +11 more 2.0-3.2.1
  • nodejs8 SLE Module for Web and Scripting 15 SP2 8.17.0-10.12.2
  • nodejs14 SLE Module for Web and Scripting 15 SP3, SLE Module for Web and Scripting 15 SP2 14.17.2-5.12.1
  • nodejs10 SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +11 more 10.24.1-1.36.1
  • nodejs12 SLE Module for Web and Scripting 15 SP3, SLE Module for Web and Scripting 15 SP2 12.22.2-4.16.1
  • nodejs12 SLE Module for Web and Scripting 12 12.22.2-1.32.1
  • nodejs10 SLE Module for Web and Scripting 12 10.24.1-1.39.1

suse advisories SUSE-SU-2021:2620-1SUSE-SU-2021:2618-1SUSE-SU-2021:2354-1SUSE-SU-2021:2353-1SUSE-SU-2021:2327-1SUSE-SU-2021:2326-1

  • nodejs14 openSUSE Tumbleweed 14.17.5-1.2
  • nodejs8 openSUSE Leap 15.2 8.17.0-lp152.3.14.1
  • nodejs8 openSUSE Leap 15.3 8.17.0-10.12.2
  • nodejs10 openSUSE Leap 15.2 10.24.1-lp152.2.15.1
  • nodejs14 openSUSE Leap 15.2 14.17.2-lp152.11.1
  • nodejs12 openSUSE Leap 15.2 12.22.2-lp152.3.15.1
  • nodejs14 openSUSE Leap 15.3 14.17.2-5.12.1
  • nodejs10 openSUSE Leap 15.3 10.24.1-1.36.1

opensuse advisories openSUSE-SU-2024:11096-1openSUSE-SU-2021:1113-1openSUSE-SU-2021:2618-1openSUSE-SU-2021:1061-1openSUSE-SU-2021:1060-1openSUSE-SU-2021:1059-1

  • nodejs-nodemon AlmaLinux 8 2.0.3-1.module_el8.4.0+2521+c668cc9f
  • nodejs-packaging AlmaLinux 8 23-3.module_el8.5.0+254+b4526b16
  • nodejs-packaging AlmaLinux 8 23-3.module_el8.4.0+2522+3bd42762
  • nodejs-packaging AlmaLinux 8 17-3.module_el8.4.0+2224+b07ac28e
  • nodejs-packaging AlmaLinux 8 17-3.module_el8.4.0+2521+c668cc9f
  • nodejs-packaging AlmaLinux 8 17-3.module_el8.3.0+2023+d2377ea3

almalinux advisories ALSA-2021:3074ALSA-2021:3073

  • nodejs Rocky Linux 8 1:14.17.3-2.module+el8.4.0+639+18660d0d
  • nodejs-nodemon Rocky Linux 8 2.0.3-1.module+el8.6.0+982+9fdca2d4
  • nodejs-nodemon Rocky Linux 8 2.0.3-1.module+el8.3.0+100+234774f7
  • nodejs-nodemon Rocky Linux 8 2.0.3-1.module+el8.4.0+638+5344c6f7
  • nodejs-packaging Rocky Linux 8 23-3.module+el8.7.0+1071+4bdda2a8
  • nodejs-packaging Rocky Linux 8 23-3.module+el8.3.0+100+234774f7
  • nodejs-packaging Rocky Linux 8 23-3.module+el8.5.0+733+de4fee6c
  • nodejs Rocky Linux 8 1:12.22.3-2.module+el8.4.0+638+5344c6f7

rocky linux advisories RLSA-2021:3074RLSA-2021:3073

  • nodejs Alpine 3.13 14.16.1-r1

alpine advisories ALPINE-CVE-2021-27290

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nodejs Arch Linux 16.4.1-1

arch linux advisories AVG-2126

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-27290 updated cvss 7.5

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

  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/kibana6-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Service Mesh 2.0 kiali, servicemesh-grafana, servicemesh-prometheus, servicemesh-grafana-prometheus
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Advanced Cluster Management for Kubernetes 2 ssri Red Hat Enterprise Linux 8 npm, pcs, nodejs, pcs-snmp, grafana-pcp, nodejs-libs, +5 more
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 npm, nodejs, grafana-pcp, nodejs-libs, nodejs-full-i18n, js-d3-flame-graph
    affected: no fix available
  • Red Hat OpenShift Container Platform 4 openshift4/ose-grafana, openshift4/ose-thanos-rhel9, golang-github-prometheus-prometheus
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift distributed tracing 2 rhosdt/jaeger-all-in-one-rhel8
    affected: no fix available
  • Red Hat Quay 3 quay/quay-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat Software Collections rh-nodejs10-npm, rh-nodejs10-nodejs Red Hat Virtualization 4 ovirt-web-ui, cockpit-ovirt-uiplugin, cockpit-ovirt-dashboard, ovirt-engine-ui-extensions
    affected: no fix planned “Will not fix”
show 5 more
  • Red Hat Enterprise Linux AppStream (v. 8) nodejs 12.22.3-2.module+el8.4.0+11732+c668cc9f, nodejs 14.17.3-2.module+el8.4.0+11738+3bd42762, nodejs-packaging 17-3.module+el8.1.0+3369+37ae6a45, nodejs-packaging 23-3.module+el8.3.0+6519+9f98ed83, nodejs-nodemon 2.0.3-1.module+el8.3.0+6519+9f98ed83, nodejs-nodemon 2.0.3-1.module+el8.4.0+11732+c668cc9f, +4 more
    fixed: vendor fix RHSA-2021:3073
  • Red Hat Enterprise Linux AppStream EUS (v. 8.1) nodejs 12.22.5-1.module+el8.1.0+12238+63fe3aec, nodejs-packaging 17-3.module+el8.1.0+3369+37ae6a45, nodejs-nodemon 1.18.3-1.module+el8.1.0+3369+37ae6a45, npm 6.14.14-1.12.22.5.1.module+el8.1.0+12238+63fe3aec, nodejs-full-i18n 12.22.5-1.module+el8.1.0+12238+63fe3aec
    fixed: vendor fix RHSA-2021:3639
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2) nodejs 12.22.5-1.module+el8.2.0+12241+a3db445b, nodejs-packaging 17-3.module+el8.1.0+3369+37ae6a45, nodejs-nodemon 1.18.3-1.module+el8.1.0+3369+37ae6a45, npm 6.14.14-1.12.22.5.1.module+el8.2.0+12241+a3db445b, nodejs-full-i18n 12.22.5-1.module+el8.2.0+12241+a3db445b
    fixed: vendor fix RHSA-2021:3638
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-nodejs12-nodejs 12.22.2-1.el7, rh-nodejs14-nodejs 14.17.2-1.el7, rh-nodejs12-npm 6.14.13-12.22.2.1.el7, rh-nodejs14-npm 6.14.13-14.17.2.1.el7, rh-nodejs12-nodejs-nodemon 2.0.3-2.el7, rh-nodejs14-nodejs-nodemon 2.0.3-2.el7 Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-nodejs12-nodejs 12.22.2-1.el7, rh-nodejs14-nodejs 14.17.2-1.el7, rh-nodejs12-npm 6.14.13-12.22.2.1.el7, rh-nodejs14-npm 6.14.13-14.17.2.1.el7, rh-nodejs12-nodejs-nodemon 2.0.3-2.el7, rh-nodejs14-nodejs-nodemon 2.0.3-2.el7 Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-nodejs12-nodejs 12.22.2-1.el7, rh-nodejs14-nodejs 14.17.2-1.el7, rh-nodejs12-npm 6.14.13-12.22.2.1.el7, rh-nodejs14-npm 6.14.13-14.17.2.1.el7, rh-nodejs12-nodejs-nodemon 2.0.3-2.el7, rh-nodejs14-nodejs-nodemon 2.0.3-2.el7
    fixed: vendor fix RHSA-2021:2931
  • Red Hat Enterprise Linux 9 pcs, pcs-snmp
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.72% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • doyensec.com https://doyensec.com/resources/Doyensec_Advisory_ssri_redos.pdf referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/yetingli/SaveResults/blob/main/pdf/ssri-redos.pdf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm ssri
>=5.2.2, <6.0.2
>=7.0.0, <7.1.1
>=8.0.0, <8.0.1
6.0.2
7.1.1
8.0.1

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.