CVE-2025-12642

lighttpd1.4.80 incorrectly merged trailer fields into headers after http request parsing. This behavior can be exploited to conduct HTTP Header Smuggling attacks. Successful exploitation may allow an attacker to: Bypass access control rules Inject unsafe input into backend logic that trusts reque...

UBUNTU-CVE-2025-12642

lighttpd1.4.80 incorrectly merged trailer fields into headers after http request parsing. This behavior can be exploited to conduct HTTP Header Smuggling attacks. Successful exploitation may allow an attacker to: Bypass access control rules Inject unsafe input into backend logic that trusts reque...

CVE-2025-12642 HTTP Header Smuggling via Trailer Merge

lighttpd1.4.80 incorrectly merged trailer fields into headers after http request parsing. This behavior can be exploited to conduct HTTP Header Smuggling attacks. Successful exploitation may allow an attacker to: Bypass access control rules Inject unsafe input into backend logic that trusts reque...

PT-2025-44791

Name of the Vulnerable Software and Affected Versions lighttpd version 1.4.80 Description The software improperly merges trailer fields into headers following HTTP request parsing, which can be leveraged to carry out HTTP Header Smuggling attacks. Successful exploitation could allow an attacker t...