Fastify's connection header abuse enables stripping of proxy-added headers

Summary @fastify/reply-from and @fastify/http-proxy process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers like access control or identification headers from upstream requests by...

CVE-2026-33805

@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them i...

Updated firefox packages fix security vulnerabilities

Updated firefox packages fix security vulnerabilities: Mozilla: Memory safety bugs fixed in Firefox ESR 60.3 CVE-2018-12389. Mozilla: Memory safety bugs fixed in Firefox 63 and Firefox ESR 60.3 CVE-2018-12390. Mozilla: Crash with nested event loops CVE-2018-12392. Mozilla: Integer overflow during...

Mozilla: WebExtension bypass of domain restrictions through header rewriting

By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that share a host that are otherwise restricted. This vulnerability affects Firefox ESR 60.3 and Firefox 63...

Mozilla: WebExtension bypass of domain restrictions through header rewriting

By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that share a host that are otherwise restricted. This vulnerability affects Firefox ESR 60.3 and Firefox 63...

HAProxy: Arbitrary code execution

Background HAProxy is a TCP/HTTP reverse proxy for high availability environments. Description A boundary error in HAProxy could cause a buffer overflow when header rewriting is enabled and the configuration sets global.tune.bufsize to a value greater than the default 16384 bytes. Impact A remote...

FreeBSD : haproxy -- buffer overflow (617959ce-a5f6-11e1-a284-0023ae8e59f0)

HAProxy reports : A flaw was reported in HAProxy where, due to a boundary error when copying data into the trash buffer, an external attacker could cause a buffer overflow. Exploiting this flaw could lead to the execution of arbitrary code, however it requires non-default settings for the...

CVE-2012-2942

Buffer overflow in the trash buffer in the header capture functionality in HAProxy before 1.4.21, when global.tune.bufsize is set to a value greater than the default and header rewriting is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via...

DEBIAN-CVE-2012-2942

Buffer overflow in the trash buffer in the header capture functionality in HAProxy before 1.4.21, when global.tune.bufsize is set to a value greater than the default and header rewriting is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via...

CVE-2012-2942

Buffer overflow in the trash buffer in the header capture functionality in HAProxy before 1.4.21, when global.tune.bufsize is set to a value greater than the default and header rewriting is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via...