DEBIAN-CVE-2026-77341
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.
DEBIAN-CVE-2026-77341
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-77341
cpp-httplib
Source reference: /affected/0/package/name
- Affected versions
- 0.11.4+ds-1
Source reference:
/affected/0/versions0.11.4+ds-1+deb12u1Source reference:
/affected/0/versions0.11.4+ds-2Source reference:
/affected/0/versions0.11.4+ds-3Source reference:
/affected/0/versions0.13.1+ds-1Source reference:
/affected/0/versions0.14.0+ds-1Source reference:
/affected/0/versions0.14.1+ds-1Source reference:
/affected/0/versions0.14.1+ds-2Source reference:
/affected/0/versions0.14.2+ds-1Source reference:
/affected/0/versions0.14.3+ds-1Source reference:
/affected/0/versions0.14.3+ds-1.1Source reference:
/affected/0/versions0.14.3+ds-1.1~exp1Source reference:
/affected/0/versions0.15.3+ds-1Source reference:
/affected/0/versions0.15.3+ds-2Source reference:
/affected/0/versions0.15.3+ds-3Source reference:
/affected/0/versions0.16.0+ds-1Source reference:
/affected/0/versions0.16.3+ds-1Source reference:
/affected/0/versions0.16.3+ds-2Source reference:
/affected/0/versions0.18.0+ds-1Source reference:
/affected/0/versions0.18.7-1Source reference:
/affected/0/versions0.20.1+ds-3Source reference:
/affected/0/versions0.25.0+ds-1Source reference:
/affected/0/versions0.26.0+ds-2Source reference:
/affected/0/versions0.41.0+ds-1Source reference:
/affected/0/versions0.41.0+ds-2Source reference:
/affected/0/versions0.41.0+ds-3Source reference:
/affected/0/versions0.41.0+ds-3~bpo13+1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cpp-httplib
Source reference: /affected/1/package/name
- Affected versions
- 0.18.7-1
Source reference:
/affected/1/versions0.18.7-1+deb13u1Source reference:
/affected/1/versions0.20.1+ds-3Source reference:
/affected/1/versions0.25.0+ds-1Source reference:
/affected/1/versions0.26.0+ds-2Source reference:
/affected/1/versions0.41.0+ds-1Source reference:
/affected/1/versions0.41.0+ds-2Source reference:
/affected/1/versions0.41.0+ds-3Source reference:
/affected/1/versions0.41.0+ds-3~bpo13+1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cpp-httplib
Source reference: /affected/2/package/name
- Affected versions
- 0.18.7-1
Source reference:
/affected/2/versions0.20.1+ds-3Source reference:
/affected/2/versions0.25.0+ds-1Source reference:
/affected/2/versions0.26.0+ds-2Source reference:
/affected/2/versions0.41.0+ds-1Source reference:
/affected/2/versions0.41.0+ds-2Source reference:
/affected/2/versions0.41.0+ds-3Source reference:
/affected/2/versions0.41.0+ds-3~bpo13+1Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cpp-httplib",
"purl": "pkg:deb/debian/cpp-httplib?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"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",
"0.14.3+ds-1.1~exp1",
"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",
"0.41.0+ds-3~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77341.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cpp-httplib",
"purl": "pkg:deb/debian/cpp-httplib?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"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",
"0.41.0+ds-3~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77341.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "cpp-httplib",
"purl": "pkg:deb/debian/cpp-httplib?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"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",
"0.41.0+ds-3~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77341.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58338 · Revision 1
- Added to Heist Feed
- Publisher date