diff --git a/SHA256SUMS b/SHA256SUMS
index b30722e..511fc09 100644
--- a/SHA256SUMS
+++ b/SHA256SUMS
@@ -326,9 +326,9 @@ b45d6040810c93ae2acb04ef6b0a59c189751edf9008cd81a4521c9e04e7f07d  src/docker.rs
 4c2c988191a97f81568a8df64af772463d010844f1abf327871901cdb32d4336  src/docker/model.rs
 5f4610c59b2d4ff6a205a2d9ae11bc84be689b2a68302459f546b3f43e53593c  src/docker/reconcile.rs
 a12c47df4b90b6fc36c978a42477e6ddffbbbf69aed7252101c2fd829709bd6e  src/docker/tests.rs
-526ae9c7f777b0442ced235237ded659e6e9457aaccc68a1fd5af80b58d3c567  src/forwarding.rs
-4be1a43a911e61ffccad01f0ca71913e5e1ee682d83591d02d478baeb900b54e  src/forwarding/peer_formatting.rs
-f3c1de0f428b008ed830ca410bfa5b4ca489a0861275b8541dbfa6217d16cb95  src/forwarding/tests.rs
+61cad5d547c4aa56017d7a7ab80f356670fdd4f5b232dc04a50dbb5969645dac  src/forwarding.rs
+9c712ed59cfca15b79c3339a031c8903c83468c9d3b5e29f7e59d9a222b97561  src/forwarding/peer_formatting.rs
+0259def26930308047a248548ff911f64638b43bdfe7f765ae8c82a87a6aab21  src/forwarding/tests.rs
 af7a4e91c32ffbe4701c8c06e48ba3f8bbbe55e8b9e877aecb30ccdf858e9e8f  src/geoip.rs
 80850f7acd1ed4c0048b065e9e81740869a8efbb0d9b5d2e83d8ec7fbc494703  src/geoip/mmdb.rs
 06aa056d789742cc11c8826c338d985e6a6fb22da6c3530937eec38e35478034  src/geoip/mmdb_tests.rs
@@ -392,7 +392,7 @@ bb8c9117e05b0cb4bbfe029ef4d1a031fc755cdce255b15dad072afd1c845737  src/proxy/forw
 9b25f5e3ea4443a63ee6f45d12e1957dd316fe8e85325fc00ea416faaab1025a  src/proxy/h2_graceful.rs
 cc7fe83f42acb19d79abe83107427cdc6b0ed14083702f4fe66af22f7cdfc4cc  src/proxy/headers.rs
 0f9314d1380febe436def36b5f381731e97cbac90625637575f38f3d72eaaace  src/proxy/headers/tests.rs
-30a01e70328e8e5d544d86e3df540c0078a17de33376d389b5ad06e351477634  src/proxy/identity.rs
+9ed6577b381285d2b7b874f60fd38d8192a0a5f3dbabdb5b737091158c43ac31  src/proxy/identity.rs
 050c66311f71cac75c1d4c8547351a1d6f1111ed0db128691366fdd73647e90a  src/proxy/mod.rs
 55133ceace2e5262d9c54fa41bea099a27b817d1e09c1cd0e2493fd9cee4da38  src/proxy/redirect_helpers.rs
 2280841494c3e14ccc5e3f02b026fe3c4328a3dab04ab449b9286bb69e39c028  src/proxy/request_id.rs
diff --git a/src/forwarding.rs b/src/forwarding.rs
index 16450f4..4cdafae 100644
--- a/src/forwarding.rs
+++ b/src/forwarding.rs
@@ -268,36 +268,50 @@ impl Compiled {
             } else {
                 String::new()
             };
-            let peer_text = cached.is_none().then(|| peer_ip.to_string());
-            let ipv6_node = (cached.is_none() && peer_ip.is_ipv6()).then(|| node(peer_ip));
-            let peer_header = if let Some(cached) = cached {
-                cached.peer_header.clone()
+            // Repeated HTTP/1.1 requests generally share Host and TLS state.
+            // Cache only the untrusted-peer metadata for this accepted socket;
+            // X-Forwarded-Uri, original URL and all trust decisions remain per-request.
+            let target_header: HeaderValue = target.parse()?;
+            let mut values = if let Some(values) =
+                cached.and_then(|peer| peer.cached_untrusted(authority, tls))
+            {
+                values
             } else {
-                HeaderValue::from_str(peer_text.as_deref().unwrap_or(""))?
+                let peer_text = cached.is_none().then(|| peer_ip.to_string());
+                let ipv6_node = (cached.is_none() && peer_ip.is_ipv6()).then(|| node(peer_ip));
+                let peer_header = if let Some(cached) = cached {
+                    cached.peer_header.clone()
+                } else {
+                    HeaderValue::from_str(peer_text.as_deref().unwrap_or(""))?
+                };
+                let by_text = cached.is_none().then(|| node(canonical(local.ip())));
+                let peer_node = cached.map_or_else(
+                    || if peer_ip.is_ipv4() { peer_text.as_deref().unwrap_or("") }
+                       else { ipv6_node.as_deref().unwrap_or("") },
+                    |cached| cached.peer_node.as_str(),
+                );
+                let by_node = cached.map_or_else(|| by_text.as_deref().unwrap_or(""),
+                    |cached| cached.by_node.as_str());
+                let forwarded = format!(
+                    "for={peer_node};by={by_node};proto={scheme};host=\"{authority_text}\""
+                );
+                let mut values = HeaderMap::with_capacity(7);
+                values.insert("forwarded", forwarded.parse()?);
+                values.insert("x-forwarded-for", peer_header.clone());
+                values.insert("x-real-ip", peer_header);
+                values.insert("x-forwarded-host", authority.clone());
+                values.insert("x-forwarded-proto", HeaderValue::from_static(scheme));
+                values.insert("x-forwarded-port", if let Some(cached) = cached {
+                    cached.port_header.clone()
+                } else {
+                    local.port().to_string().parse()?
+                });
+                if let Some(peer) = cached {
+                    peer.remember_untrusted(authority, tls, &values);
+                }
+                values
             };
-            let by_text = cached.is_none().then(|| node(canonical(local.ip())));
-            let peer_node = cached.map_or_else(
-                || if peer_ip.is_ipv4() { peer_text.as_deref().unwrap_or("") }
-                   else { ipv6_node.as_deref().unwrap_or("") },
-                |cached| cached.peer_node.as_str(),
-            );
-            let by_node = cached.map_or_else(|| by_text.as_deref().unwrap_or(""),
-                |cached| cached.by_node.as_str());
-            let forwarded = format!(
-                "for={peer_node};by={by_node};proto={scheme};host=\"{authority_text}\""
-            );
-            let mut values = HeaderMap::with_capacity(7);
-            values.insert("forwarded", forwarded.parse()?);
-            values.insert("x-forwarded-for", peer_header.clone());
-            values.insert("x-real-ip", peer_header);
-            values.insert("x-forwarded-host", authority.clone());
-            values.insert("x-forwarded-proto", HeaderValue::from_static(scheme));
-            values.insert("x-forwarded-port", if let Some(cached) = cached {
-                cached.port_header.clone()
-            } else {
-                local.port().to_string().parse()?
-            });
-            values.insert("x-forwarded-uri", target.parse()?);
+            values.insert("x-forwarded-uri", target_header);
             return Ok(Context {
                 client_ip: peer_ip,
                 scheme,
diff --git a/src/forwarding/peer_formatting.rs b/src/forwarding/peer_formatting.rs
index 685db12..f25e65f 100644
--- a/src/forwarding/peer_formatting.rs
+++ b/src/forwarding/peer_formatting.rs
@@ -1,4 +1,4 @@
-/// Immutable formatting shared by all HTTP/1 requests on one accepted socket.
+/// Socket formatting shared by all HTTP/1 requests on one accepted socket.
 /// No routing or trust decision is cached: those follow the current snapshot.
 #[derive(Debug)]
 pub(crate) struct PeerFormatting {
@@ -9,6 +9,15 @@ pub(crate) struct PeerFormatting {
     peer_node: String,
     by_node: String,
     port_header: HeaderValue,
+    // One-entry, per-accepted-socket cache. No policy or client identity is cached.
+    untrusted_headers: std::sync::Mutex<Option<UntrustedHeaders>>,
+}
+#[derive(Debug)]
+struct UntrustedHeaders {
+    authority: HeaderValue,
+    tls: bool,
+    // The URI is intentionally excluded: it can change on every request.
+    base: HeaderMap,
 }
 impl PeerFormatting {
     pub(crate) fn new(peer: SocketAddr, local: SocketAddr) -> Self {
@@ -23,7 +32,25 @@ impl PeerFormatting {
             by_node: node(canonical(local.ip())),
             port_header: HeaderValue::from_str(&local.port().to_string())
                 .expect("TCP port is a valid header"),
+            untrusted_headers: std::sync::Mutex::new(None),
         }
     }
     fn peer_header(&self) -> &HeaderValue { &self.peer_header }
+
+    fn cached_untrusted(&self, authority: &HeaderValue, tls: bool) -> Option<HeaderMap> {
+        self.untrusted_headers.lock().unwrap_or_else(|e| e.into_inner())
+            .as_ref()
+            .filter(|entry| entry.tls == tls
+                && entry.authority.as_bytes() == authority.as_bytes())
+            .map(|entry| entry.base.clone())
+    }
+
+    fn remember_untrusted(&self, authority: &HeaderValue, tls: bool, base: &HeaderMap) {
+        *self.untrusted_headers.lock().unwrap_or_else(|e| e.into_inner()) =
+            Some(UntrustedHeaders {
+                authority: authority.clone(),
+                tls,
+                base: base.clone(),
+            });
+    }
 }
diff --git a/src/forwarding/tests.rs b/src/forwarding/tests.rs
index 607dce8..7a9fe60 100644
--- a/src/forwarding/tests.rs
+++ b/src/forwarding/tests.rs
@@ -63,6 +63,74 @@ mod tests {
         }
     }
 
+    #[test]
+    fn untrusted_socket_header_cache_respects_host_uri_scheme_and_trust() {
+        for (peer, local) in [
+            ("192.0.2.51:32000", "127.0.0.1:8080"),
+            ("[2001:db8::8]:32100", "[2001:db8::1]:8443"),
+        ] {
+            let peer: SocketAddr = peer.parse().unwrap();
+            let local: SocketAddr = local.parse().unwrap();
+            let formatter = PeerFormatting::new(peer, local);
+            let compiled = Settings::default().compile().unwrap();
+            let mut incoming = HeaderMap::new();
+            incoming.append("x-forwarded-for", "203.0.113.11".parse().unwrap());
+            incoming.append("forwarded", "for=203.0.113.12".parse().unwrap());
+            for (host, tls, path) in [
+                ("app.example:8080", false, "/small.html"),
+                ("app.example:8080", false, "/small.html"),
+                ("app.example:8080", false, "/other?x=1"),
+                ("other.example:8080", false, "/small.html"),
+                ("other.example:8080", true, "/small.html"),
+                ("app.example:8080", true, "/last?x=1&y=2"),
+            ] {
+                let host = HeaderValue::from_str(host).unwrap();
+                let uri: Uri = path.parse().unwrap();
+                for original_url in [false, true] {
+                    let direct = compiled.context_with_original_url(
+                        &incoming, peer, local, tls, &host, &uri, original_url,
+                    ).unwrap();
+                    let cached = compiled.context_with_peer(
+                        &incoming, peer, local, tls, &host, &uri, original_url,
+                        Some(&formatter), false,
+                    ).unwrap();
+                    assert_eq!(cached.client_ip, direct.client_ip);
+                    assert_eq!(cached.scheme, direct.scheme);
+                    assert_eq!(cached.original_url, direct.original_url);
+                    assert_eq!(cached.values, direct.values);
+                    let mut direct_headers = incoming.clone();
+                    let mut cached_headers = incoming.clone();
+                    direct.apply_upstream(&mut direct_headers, true);
+                    cached.apply_upstream(&mut cached_headers, true);
+                    assert_eq!(direct_headers, cached_headers);
+                }
+            }
+            // When the peer becomes trusted after a config swap, the single-entry
+            // untrusted cache must never override the incoming proxy chain.
+            if peer.is_ipv4() {
+                let trusted = Settings {
+                    trusted_proxies: vec!["192.0.2.0/24".to_owned()],
+                    trust_forwarded_proto: true,
+                }.compile().unwrap();
+                let mut forwarded = HeaderMap::new();
+                forwarded.insert("x-forwarded-for", "198.51.100.9".parse().unwrap());
+                forwarded.insert("x-forwarded-proto", "https".parse().unwrap());
+                let host = HeaderValue::from_static("app.example");
+                let uri: Uri = "/trusted".parse().unwrap();
+                let direct = trusted.context_with_original_url(
+                    &forwarded, peer, local, false, &host, &uri, false,
+                ).unwrap();
+                let cached = trusted.context_with_peer(
+                    &forwarded, peer, local, false, &host, &uri, false,
+                    Some(&formatter), false,
+                ).unwrap();
+                assert_eq!(cached.client_ip, "198.51.100.9".parse::<IpAddr>().unwrap());
+                assert_eq!(cached.scheme, "https");
+                assert_eq!(cached.values, direct.values);
+            }
+        }
+    }
+
     #[test]
     fn canonical_forwarding_headers_replace_duplicate_untrusted_values() {
         let compiled = Settings::default().compile().unwrap();