CVE-2021-40897 json
A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in split-html-to-chars v1.0.5 when splitting crafted invalid ht…
published 2022-06-27 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-28052
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
Summary
A Regular Expression Denial of Service (ReDOS) vulnerability was discovered in split-html-to-chars v1.0.5 when splitting crafted invalid htmls.
Exploit prediction
1.05% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/yetingli/SaveResults/blob/main/js/split-html-to-chars.js 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
/yetingli/SaveResults/blob/main/js/split-html-to-chars.js
exploit, third-party-advisory
Sources
- CVE List CVE-2021-40897
- NVD CVE-2021-40897
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.