What is CVE-2023-26130?

CVE-2023-26130 is a high-severity vulnerability in Cpp-Httplib Project, classified under CRLF Injection. CVSS score: 7.5/10. Published 2023-05-30.

How severe is CVE-2023-26130?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-26130 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Cpp-Httplib Project

CVE-2023-26130

Versions of the package yhirose/cpp-httplib before 0.12.4 are vulnerable to CRLF Injection when untrusted user input is used to set the content-type header in the HTTP .Patch, .Post, .Put and .Delete requests. This can lead to logical errors and other misbehaviors. **Note:** This issue is present due to an incomplete fix for [CVE-2020-11709](https://security.snyk.io/vuln/SNYK-UNMANAGED-YHIROSECPPHTTPLIB-2366507).

Vulnerability class: CRLF Injection

Published 2023-05-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (65.3th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Cpp-Httplib Project
Yhirose/cpp-Httplib — versions 0

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2023-26130?: CVE-2023-26130 is a high-severity vulnerability in Cpp-Httplib Project, classified under CRLF Injection. CVSS score: 7.5/10. Published 2023-05-30.
How severe is CVE-2023-26130?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-26130 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.