https://github.com/python/cpython/commit/b2742046576487ccf20be9496fb74a476a6c5312
commit: b2742046576487ccf20be9496fb74a476a6c5312
branch: 3.13
author: Miss Islington (bot) <[email protected]>
committer: StanFromIreland <[email protected]>
date: 2026-05-02T12:13:57+01:00
summary:

[3.13] gh-111264: Add a note about untrusted input to tomllib docs (#149226)

(cherry picked from commit 9d41e2a534aab460dd656ef251adaed5d2d64b93)

Co-authored-by: Petr Viktorin <[email protected]>
Co-authored-by: Stan Ulbrych <[email protected]>

files:
M Doc/library/tomllib.rst

diff --git a/Doc/library/tomllib.rst b/Doc/library/tomllib.rst
index 521a7a17fb3e8b..77555c0e484904 100644
--- a/Doc/library/tomllib.rst
+++ b/Doc/library/tomllib.rst
@@ -17,6 +17,13 @@ This module provides an interface for parsing TOML 1.0.0 
(Tom's Obvious Minimal
 Language, `https://toml.io <https://toml.io/en/>`_). This module does not
 support writing TOML.
 
+.. warning::
+
+   Be cautious when parsing data from untrusted sources.
+   A malicious TOML string may cause the decoder to consume considerable
+   CPU and memory resources.
+   Limiting the size of data to be parsed is recommended.
+
 .. seealso::
 
     The :pypi:`Tomli-W package <tomli-w>`

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