OESA-2026-4093

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-4093
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-4093.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-4093
Upstream
Published
2026-09-25T01:28:19Z
Modified
2026-09-25T01:45:10Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
cpp-httplib security update
Details

A C++11 single-file header-only cross platform HTTP/HTTPS library. It's extremely easy to setup. Just include httplib.h file in your code!

Security Fix(es):

cpp-httplib is a C++ header-only HTTP/HTTPS library. In version 0.49.0, the chunked-response trailer output path writes trailer header names and values directly to the socket without validating them, allowing CRLF sequences in a trailer field to inject additional headers or split the HTTP response. Unlike every other header-writing path in the library, the trailer-writing code applies none of the field-name and field-value checks that reject carriage return and line feed, so an application that places attacker-influenced data into a chunked response trailer emits attacker-controlled CRLF onto the wire. This enables HTTP response splitting, letting an attacker forge response headers or inject a second response. This issue is fixed in version 0.50.0.(CVE-2026-77341)

Database specific 
{
    "severity":  "Medium"
}
References

Affected packages

openEuler:24.03-LTS-SP3 / cpp-httplib

Package

Name
cpp-httplib
Purl
pkg:rpm/openEuler/cpp-httplib&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.46.0-3.oe2403sp3

Ecosystem specific 

{
    "aarch64":  [
        "cpp-httplib-0.46.0-3.oe2403sp3.aarch64.rpm",
        "cpp-httplib-debuginfo-0.46.0-3.oe2403sp3.aarch64.rpm",
        "cpp-httplib-debugsource-0.46.0-3.oe2403sp3.aarch64.rpm",
        "cpp-httplib-devel-0.46.0-3.oe2403sp3.aarch64.rpm"
    ],
    "src":  [
        "cpp-httplib-0.46.0-3.oe2403sp3.src.rpm"
    ],
    "x86_64":  [
        "cpp-httplib-0.46.0-3.oe2403sp3.x86_64.rpm",
        "cpp-httplib-debuginfo-0.46.0-3.oe2403sp3.x86_64.rpm",
        "cpp-httplib-debugsource-0.46.0-3.oe2403sp3.x86_64.rpm",
        "cpp-httplib-devel-0.46.0-3.oe2403sp3.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-4093.json"