Anubis
Monthly
Challenge bypass in Anubis Web AI Firewall (versions 1.22.0 through pre-1.26.0-pre1) allows unauthenticated remote HTTP clients to circumvent bot-challenge enforcement by supplying a crafted X-Original-URI header. PathChecker.Check() in lib/policy/checker.go unconditionally trusted this client-controlled header over the actual request path, enabling any client to match default ALLOW rules (e.g., ^/\.well-known/.*$) and reach upstream resources without completing the Anubis challenge. No active exploitation confirmed (not in CISA KEV) and no public exploit code identified at time of analysis, but the bypass is trivially reproducible with a single HTTP header manipulation.
Challenge bypass in Anubis Web AI Firewall (versions 1.22.0 through pre-1.26.0-pre1) allows unauthenticated remote HTTP clients to circumvent bot-challenge enforcement by supplying a crafted X-Original-URI header. PathChecker.Check() in lib/policy/checker.go unconditionally trusted this client-controlled header over the actual request path, enabling any client to match default ALLOW rules (e.g., ^/\.well-known/.*$) and reach upstream resources without completing the Anubis challenge. No active exploitation confirmed (not in CISA KEV) and no public exploit code identified at time of analysis, but the bypass is trivially reproducible with a single HTTP header manipulation.