CVE-2021-45470 json
lib/DatabaseLayer.py in cve-search before 4.1.0 allows regular expression injection, which can lead to ReDoS (regular expression denial of…
published 2021-12-23 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-32236
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.9%
- EPSS 1.9% chance of exploitation in 30 days, percentile 80%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- circl cve-search 4.1.0
- github.com/cve-search/cve-search@c621f9f commit
- github.com/cve-search/cve-search#629 pull request
Exploit prediction
1.94% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/cve-search/cve-search/pull/629 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 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-1333 Inefficient Regular Expression Complexity
References
-
github.com
/cve-search/cve-search/pull/629
exploit, patch, third-party-advisory
-
github.com
/cve-search/cve-search/commit/c621f9f0693a728b93ff3b964f948a1d25917207
patch, third-party-advisory
-
github.com
/cve-search/cve-search/compare/v4.0...v4.1.0
third-party-advisory
Sources
- CVE List CVE-2021-45470
- NVD CVE-2021-45470
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.