HighFix available
lighttpd — security advisory
A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67.
- Products
- lighttpd
- Affected versions
- Not specified
- Fixed versions
- 1.4.67-r0
- CVEs
- CVE-2022-41556
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:17 UTC · Revision 1
Source evidence
A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67.
osv:ALPINE-CVE-2022-41556
lighttpd
Fixed versions: 1.4.67-r0
lighttpd
Fixed versions: 1.4.67-r0
lighttpd
Fixed versions: 1.4.67-r0
lighttpd
Fixed versions: 1.4.67-r0
lighttpd
Fixed versions: 1.4.67-r0
lighttpd
Fixed versions: 1.4.67-r0
lighttpd
Fixed versions: 1.4.67-r0
lighttpd
Fixed versions: 1.4.67-r0
lighttpd
Fixed versions: 1.4.67-r0
lighttpd
Fixed versions: 1.4.67-r0
Complete source record
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"modified": "2026-10-15T07:17:54.251772319Z",
"provider": "osv",
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"source_id": "core-osv",
"document_id": 321967,
"published_at": "2022-10-06T18:17:03.62+00:00"
}