CVE-2021-45470

HIGHNVD 7.57.5—

7.5

lib/DatabaseLayer.py in cve-search before 4.1.0 allows regular expression injection, which can lead to ReDoS (regular expression denial of service) or other impacts.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 61.3%
KEV: Not listed

Published

December 23, 2021

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://github.com/cve-search/cve-search/commit/c621f9f0693a728b93ff3b964f948a1d25917207
cve@mitrehttps://github.com/cve-search/cve-search/compare/v4.0...v4.1.0
cve@mitrehttps://github.com/cve-search/cve-search/pull/629
af854a3a-2127-422b-91ae-364da2661108https://github.com/cve-search/cve-search/commit/c621f9f0693a728b93ff3b964f948a1d25917207
af854a3a-2127-422b-91ae-364da2661108https://github.com/cve-search/cve-search/compare/v4.0...v4.1.0
af854a3a-2127-422b-91ae-364da2661108https://github.com/cve-search/cve-search/pull/629

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-1333Inefficient Regular Expression Complexity (ReDoS)

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 05:50 UTCEG score recompute
2026-05-26 05:50 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-45470?

CVE-2021-45470 is a high vulnerability published on December 23, 2021. lib/DatabaseLayer.py in cve-search before 4.1.0 allows regular expression injection, which can lead to ReDoS (regular expression denial of service) or other impacts.

When was CVE-2021-45470 disclosed?

CVE-2021-45470 was first published in the National Vulnerability Database on December 23, 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-2021-45470 actively exploited?

CVE-2021-45470 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 61.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-45470?

CVE-2021-45470 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-45470?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-45470, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-45470

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CVE-2021-45470

📅 Published

🔄 Last Modified

🔗 References (6)