CVE-2021-45470

Name: CVE-2021-45470
Creator: NVD / NIST
Published: 2021-12-23T21:15:09.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.87%

Last modified Jun 17, 2026

CVE-2021-45470 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.87% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.87%

76.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1333

Affected Software

Vendor	Product	Versions
Circl	Cve-Search	< 4.1.0

References

https://github.com/cve-search/cve-search/commit/c621f9f0693a728b93ff3b964f948a1d25917207Patch, Third Party Advisory
https://github.com/cve-search/cve-search/compare/v4.0...v4.1.0Third Party Advisory
https://github.com/cve-search/cve-search/pull/629Exploit, Patch, Third Party Advisory
https://github.com/cve-search/cve-search/commit/c621f9f0693a728b93ff3b964f948a1d25917207Patch, Third Party Advisory
https://github.com/cve-search/cve-search/compare/v4.0...v4.1.0Third Party Advisory
https://github.com/cve-search/cve-search/pull/629Exploit, Patch, Third Party Advisory

Timeline

Published: Dec 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45470?

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.

How severe is CVE-2021-45470?

CVE-2021-45470 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.87% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45470?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45470?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST