CVE-2023-26130

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-30 · updated 2026-06-17
Weakness: CWE-93

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).

Affected products

yhirose/cpp-httplib: before 0.12.4 — fixed in 0.12.4

How to fix

Upgrade to a fixed version: yhirose/cpp-httplib 0.12.4. Check the vendor advisory for mitigations.

References

https://gist.github.com/dellalibera/094aece17a86069a7d27f93c8aba2280
https://github.com/yhirose/cpp-httplib/commit/5b397d455d25a391ba346863830c1949627b4d08
https://github.com/yhirose/cpp-httplib/releases/tag/v0.12.4
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2RY6PKBU73I45L6YWNYCUK2XBEXEFX7L/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JY2E7EIRWQMKH6GY4OZOWWBZBY3Q7CGS/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYODHZECXYFC2BNODZPZXZAXOKGMCYAP/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U6MO4FSKYNSAJVUXYP7LRY7ARUIGKBFL/
https://security.snyk.io/vuln/SNYK-UNMANAGED-YHIROSECPPHTTPLIB-5591194
https://gist.github.com/dellalibera/094aece17a86069a7d27f93c8aba2280
https://github.com/yhirose/cpp-httplib/commit/5b397d455d25a391ba346863830c1949627b4d08
https://github.com/yhirose/cpp-httplib/releases/tag/v0.12.4
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2RY6PKBU73I45L6YWNYCUK2XBEXEFX7L/

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