From 7a57f7c73749e0adfeafcb12b8708cacfdbe3f3e Mon Sep 17 00:00:00 2001
From: vishal-vanam <vanam.vishal12@gmail.com>
Date: Mon, 13 Apr 2026 18:52:44 -0400
Subject: [PATCH] fix: strip stale Content-Length header in pass-through
 endpoint after gzip decompression

Fixes #25624
---
 litellm/proxy/pass_through_endpoints/pass_through_endpoints.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py b/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py
index d582240395f..a43fb439bf1 100644
--- a/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py
+++ b/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py
@@ -320,7 +320,7 @@ class HttpPassThroughEndpointHelpers(BasePassthroughUtils):
         litellm_call_id: Optional[str] = None,
         custom_headers: Optional[dict] = None,
     ) -> dict:
-        excluded_headers = {"transfer-encoding", "content-encoding"}
+        excluded_headers = {"transfer-encoding", "content-encoding", "content-length"}
 
         return_headers = {
             key: value