No exploitation reportedFix available

CVE-2023-26130

Q: Is CVE-2023-26130 actively exploited?

Active exploitation of CVE-2023-26130 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-26130?

CVE-2023-26130 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2023-05-30
Fixed in0.12.4
WeaknessCWE-74 · CWE-77 · CWE-93

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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).

Timeline

dates in UTC

2023-05-3005:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-26130?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-26130?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · CISA-ADP

Cpp-httplib project cpp-httplib

Branch	Affected	Fixed in	Source
0.12	< 0.12.4	0.12.4	NVD

Yhirose cpp-httplib

Branch	Affected	Fixed in	Source
0.12	< 0.12.4	0.12.4	CISA-ADP

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Cpp-httplib project cpp-httplib to 0.12.4

Advisories and patches

github.comPatch
github.comRelease Notes

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-05-21
OpenCVESSVC decisionnone—
CNACVSS 3.17.5read 2026-10-23
NVDCVSS 3.18.8read 2026-10-23
CISA-ADPweakness (CWE)CWE-772024-05-21
CNAweakness (CWE)CWE-93read 2026-10-23
NVDweakness (CWE)CWE-74read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2023-05-30
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-26130?

Is CVE-2023-26130 actively exploited?

Active exploitation of CVE-2023-26130 has not been confirmed. Its EPSS score was 1.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-26130?

CVE-2023-26130 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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