diff --git a/source/isaaclab/config/extension.toml b/source/isaaclab/config/extension.toml
index e1f7205392a..48a598cd23f 100644
--- a/source/isaaclab/config/extension.toml
+++ b/source/isaaclab/config/extension.toml
@@ -1,7 +1,7 @@
 [package]
 
 # Note: Semantic Versioning is used: https://semver.org/
-version = "0.48.5"
+version = "0.48.6"
 
 # Description
 title = "Isaac Lab framework for Robot Learning"
diff --git a/source/isaaclab/docs/CHANGELOG.rst b/source/isaaclab/docs/CHANGELOG.rst
index 6a5b57f89c2..7cf8f56ab5e 100644
--- a/source/isaaclab/docs/CHANGELOG.rst
+++ b/source/isaaclab/docs/CHANGELOG.rst
@@ -1,6 +1,15 @@
 Changelog
 ---------
 
+0.48.6 (2025-11-21)
+~~~~~~~~~~~~~~~~~~~
+
+Fixed
+^^^^^
+
+* Prevent randomizing mass to zero in :meth:`~isaaclab.envs.mdp.events.randomize_mass_by_scale` to avoid physics errors.
+
+
 0.48.5 (2025-11-14)
 ~~~~~~~~~~~~~~~~~~~
 
diff --git a/source/isaaclab/isaaclab/envs/mdp/events.py b/source/isaaclab/isaaclab/envs/mdp/events.py
index 7ea6d7b2e0a..02d1561a915 100644
--- a/source/isaaclab/isaaclab/envs/mdp/events.py
+++ b/source/isaaclab/isaaclab/envs/mdp/events.py
@@ -360,6 +360,7 @@ def __call__(
         masses = _randomize_prop_by_op(
             masses, mass_distribution_params, env_ids, body_ids, operation=operation, distribution=distribution
         )
+        masses = torch.clamp(masses, min=1e-6)  # ensure masses are positive
 
         # set the mass into the physics simulation
         self.asset.root_physx_view.set_masses(masses, env_ids)