DEBIAN-CVE-2026-21428

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2026-21428
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-21428.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-21428
Upstream
Published
2026-01-01T18:15:41Z
Modified
2026-09-14T17:02:41Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.30.0, the write_headers function does not check for CR & LF characters in user supplied headers, allowing untrusted header value to escape header lines. This vulnerability allows attackers to add extra headers, modify request body unexpectedly & trigger an SSRF attack. When combined with a server that supports http1.1 pipelining (springboot, python twisted etc), this can be used for server side request forgery (SSRF). Version 0.30.0 fixes this issue.

References

Affected packages

Debian:12 / cpp-httplib

Package

Name
cpp-httplib
Purl
pkg:deb/debian/cpp-httplib?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.11.4+ds-1
0.11.4+ds-1+deb12u1
0.11.4+ds-2
0.11.4+ds-3
0.13.1+ds-1
0.14.0+ds-1
0.14.1+ds-1
0.14.1+ds-2
0.14.2+ds-1
0.14.3+ds-1
0.14.3+ds-1.1~exp1
0.14.3+ds-1.1
0.15.3+ds-1
0.15.3+ds-2
0.15.3+ds-3
0.16.0+ds-1
0.16.3+ds-1
0.16.3+ds-2
0.18.0+ds-1
0.18.7-1
0.20.1+ds-3
0.25.0+ds-1
0.26.0+ds-2
0.41.0+ds-1
0.41.0+ds-2
0.41.0+ds-3~bpo13+1
0.41.0+ds-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-21428.json"

Debian:13 / cpp-httplib

Package

Name
cpp-httplib
Purl
pkg:deb/debian/cpp-httplib?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.18.7-1
0.18.7-1+deb13u1
0.20.1+ds-3
0.25.0+ds-1
0.26.0+ds-2
0.41.0+ds-1
0.41.0+ds-2
0.41.0+ds-3~bpo13+1
0.41.0+ds-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-21428.json"

Debian:14 / cpp-httplib

Package

Name
cpp-httplib
Purl
pkg:deb/debian/cpp-httplib?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.41.0+ds-3

Affected versions

0.*
0.18.7-1
0.20.1+ds-3
0.25.0+ds-1
0.26.0+ds-2
0.41.0+ds-1
0.41.0+ds-2
0.41.0+ds-3~bpo13+1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-21428.json"