Is CVE-2023-34188 actively exploited?

CVE-2023-34188 has no public evidence of in-the-wild exploitation as of 2025-02-28.

What is the CVSS score for CVE-2023-34188?

CVE-2023-34188 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2023-34188?

Patch guidance is available from cesanta security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-34188.

Fix CVE-2023-34188 - HIGH cesanta mongoose

Description

The HTTP server in Mongoose before 7.10 accepts requests containing negative Content-Length headers. By sending a single attack payload over TCP, an attacker can cause an infinite loop in which the server continuously reparses that payload, and does not respond to any other requests.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: NVD-CWE-OtherCWE-1284

Metadata

Primary Vendor: CESANTA
Published: 6/23/2023
Last Modified: 2/28/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

cesanta : mongoose

Remediation Guidance

Executive Summary

Cite this page

CVE-2023-34188. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2023-34188

View on NIST NVD

CVE-2023-34188 vulnerability