CVE-2021-27290

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 4.7%, top 9% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

March 12, 2021

Last Modified

November 21, 2024

References (10)

Vendor Advisories for CVE-2021-27290(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatnodejs:12-8010020210817113128.c27ad7f82021-09-22redhat
redhatnodejs:12-8020020210817125332.4cda2c842021-09-22redhat
redhatnodejs:12-8040020210708131418.522a0ee42021-08-10redhat
redhatnodejs:14-8040020210708154809.522a0ee42021-08-10redhat
redhatrh-nodejs12-nodejs-nodemon-0:2.0.3-2.el72021-07-28redhat
redhatrh-nodejs14-nodejs-nodemon-0:2.0.3-2.el72021-07-28redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
nodejs—14.16.1-r1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
node-ssri—8.0.1-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
node-ssri—8.0.1-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
node-ssri—8.0.1-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
node-ssri—8.0.1-1—
npm(1)
PackageVulnerable rangeFixed inDependents
ssri8.0.08.0.1—

Additional Vendor Advisories

(4)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 161 total refreshes for this CVE.

  1. 2026-09-18 19:23 UTCEPSS rescore
  2. 2026-09-17 19:23 UTCEPSS rescore
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  11. 2026-09-08 21:56 UTCEPSS rescore
  12. 2026-09-07 15:58 UTCEPSS rescore
  13. 2026-09-06 21:13 UTCOSV refresh
  14. 2026-09-06 13:44 UTCEPSS rescore
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  1. 2026-08-26 14:42 UTCEPSS rescore
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  6. 2026-08-20 22:52 UTCEPSS rescore
  7. 2026-08-20 07:25 UTCOSV refresh
  8. 2026-08-19 17:01 UTCEPSS rescore
  9. 2026-08-18 13:45 UTCEPSS rescore
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  21. 2026-08-06 13:43 UTCEPSS rescore
  22. 2026-08-05 19:14 UTCEPSS rescore
  23. 2026-08-05 02:11 UTCOSV refresh
  24. 2026-08-04 15:06 UTCEPSS rescore
  25. 2026-08-04 10:34 UTCEPSS rescore
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  27. 2026-08-02 02:24 UTCEPSS rescore
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  37. 2026-07-23 01:59 UTCEG score recompute
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  39. 2026-07-22 14:06 UTCEPSS rescore
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  41. 2026-07-21 15:22 UTCEPSS rescore
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  44. 2026-07-19 14:28 UTCEPSS rescore
  45. 2026-07-19 02:27 UTCEPSS rescore
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  47. 2026-07-19 00:29 UTCOSV refresh
  48. 2026-07-18 10:02 UTCEPSS rescore
  49. 2026-07-18 10:02 UTCEPSS rescore
  50. 2026-07-16 17:00 UTCEPSS rescore
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  73. 2026-07-01 07:18 UTCOSV refresh
  74. 2026-06-30 23:20 UTCEPSS rescore
  75. 2026-06-30 23:20 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-27290?
CVE-2021-27290 is a high vulnerability published on March 12, 2021. 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.
When was CVE-2021-27290 disclosed?
CVE-2021-27290 was first published in the National Vulnerability Database on March 12, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-27290 actively exploited?
CVE-2021-27290 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.6% of all scored CVEs.
What is the CVSS score of CVE-2021-27290?
CVE-2021-27290 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2021-27290?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-27290, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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