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CVE-2023-4540

22
FAUCET Score

CVE-2023-4540 describes an Improper Handling of Exceptional Conditions vulnerability in the daurnimator lua-http library, affecting all versions prior to commit ddab283. An unauthenticated attacker can trigger a denial-of-service (DoS) by sending a specially crafted request, causing the program to enter an infinite loop due to excessive allocation. This vulnerability carries a CVSS v3.1 score of 7.5 (High), indicating a network-exploitable issue with low attack complexity and high availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.4CPE matchmatch criteria
cpe:2.3:a:daurnimator:lua-http:0.4:*:*:*:*:lua:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.94%
Probability of exploitation in next 30 days
EPSS Percentile
57.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0094 is in the 32nd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

https / /cert.pl/en/posts/2023/09/CVE-2023-4540
cert.pl / en/posts/2023/09/CVE-2023-4540
cert.pl / posts/2023/09/CVE-2023-4540
PatchThird Party Advisory
github.com / daurnimator/lua-http/commit/ddab2835c583d45dec62680ca8d3cbde55e0bae6
Patch