Описание
A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.
| Релиз | Статус | Примечание |
|---|---|---|
| devel | needed | |
| esm-infra/bionic | needed | |
| esm-infra/focal | needed | |
| esm-infra/xenial | needed | |
| jammy | needed | |
| noble | needed | |
| plucky | ignored | end of life, was deferred [2026-01-13] |
| questing | needed | |
| upstream | needs-triage |
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| Релиз | Статус | Примечание |
|---|---|---|
| devel | not-affected | 3.6.6-1 |
| esm-apps/jammy | needed | |
| jammy | needed | |
| noble | needed | |
| plucky | ignored | end of life, was deferred [2026-01-13] |
| questing | needed | |
| upstream | released | 3.6.5-7 |
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EPSS
8.2 High
CVSS3
Связанные уязвимости
A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.
A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.
Libsoup: libsoup: duplicate host header handling causes host-parsing discrepancy (first- vs last-value wins)
A flaw in libsoup\u2019s HTTP header handling allows multiple Host: he ...
EPSS
8.2 High
CVSS3