From b198e04645804aa0cd07bce12b491533a9b439ec Mon Sep 17 00:00:00 2001
From: Michael Weiss <code@mweiss.ch>
Date: Wed, 14 Jan 2026 20:51:40 +0100
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Add=20encoding=20validation=20in=20?=
 =?UTF-8?q?parse=5Ffile()?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 bibtexparser/entrypoint.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/bibtexparser/entrypoint.py b/bibtexparser/entrypoint.py
index 3024784..761bac9 100644
--- a/bibtexparser/entrypoint.py
+++ b/bibtexparser/entrypoint.py
@@ -1,3 +1,4 @@
+import codecs
 import warnings
 from typing import Iterable
 from typing import List
@@ -125,7 +126,13 @@ def parse_file(
 
     :param encoding: Encoding of the .bib file. Default encoding is ``"UTF-8"``.
     :return: Library: Parsed BibTeX library
+    :raises LookupError: If the specified encoding is not recognized.
     """
+    try:
+        codecs.lookup(encoding)
+    except LookupError:
+        raise LookupError(f"Unknown encoding: {encoding!r}")
+
     with open(path, encoding=encoding) as f:
         bibtex_str = f.read()
         return parse_string(