CVE-2023-40518 json
LiteSpeed OpenLiteSpeed before 1.7.18 does not strictly validate HTTP request headers.
published 2023-08-14 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-45089
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
LiteSpeed OpenLiteSpeed before 1.7.18 does not strictly validate HTTP request headers.
Patch / fix
- litespeedtech openlitespeed 1.7.18
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
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:H/A:N |
References
-
litespeedtech.com
/products/litespeed-web-server/release-log
release-notes
-
openlitespeed.org
/release-log/version-1-7-x/
release-notes
Sources
- CVE List CVE-2023-40518
- NVD CVE-2023-40518
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