diff --git a/src/lightning/fabric/CHANGELOG.md b/src/lightning/fabric/CHANGELOG.md
index 2c68c4102c48d..324cf25cd9527 100644
--- a/src/lightning/fabric/CHANGELOG.md
+++ b/src/lightning/fabric/CHANGELOG.md
@@ -22,14 +22,15 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 -
 
---
+---
+
+## [2.6.4] - 2026-05-20
 
-## [2.6.2] - 2026-03-19
+> Versions 2.6.2 and 2.6.3 were skipped due to a supply chain security compromise. See [#21691](https://github.com/Lightning-AI/pytorch-lightning/issues/21691) for details.
 
 ### Fixed
 
 - Fixed FSDP mixed precision (`bf16-mixed`, `16-mixed`) initializing model parameters in half precision instead of fp32 ([#21586](https://github.com/Lightning-AI/pytorch-lightning/pull/21586))
-
 - Fixed `device_mesh` type hint in `FSDPStrategy` to accept a 2-element tuple via the CLI ([#21581](https://github.com/Lightning-AI/pytorch-lightning/pull/21581))
 
 ---
diff --git a/src/lightning/pytorch/CHANGELOG.md b/src/lightning/pytorch/CHANGELOG.md
index 89e7da957f7a2..cdc420045109e 100644
--- a/src/lightning/pytorch/CHANGELOG.md
+++ b/src/lightning/pytorch/CHANGELOG.md
@@ -28,30 +28,26 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ---
 
-## [2.6.2] - 2026-03-19
+## [2.6.4] - 2026-05-20
 
+> Versions 2.6.2 and 2.6.3 were skipped due to a supply chain security compromise. See [#21691](https://github.com/Lightning-AI/pytorch-lightning/issues/21691) for details.
 
 ### Removed
 
 - Removed support for Neptune logger ([#21572](https://github.com/Lightning-AI/pytorch-lightning/pull/21572))
 
-
 ### Changed
 
 - Raise minimum `LitLogger` version to `2026-03-17` ([#21591](https://github.com/Lightning-AI/pytorch-lightning/pull/21591))
 
-
 ### Fixed
 
 - Fixed `val_check_interval` raising `ValueError` when `limit_val_batches=0` and interval exceeds training batches ([#21560](https://github.com/Lightning-AI/pytorch-lightning/pull/21560))
-
 - Fixed pkg-resources deprecation issue ([#21538](https://github.com/Lightning-AI/pytorch-lightning/pull/21538))
-
 - Fixed FSDP mixed precision (`bf16-mixed`, `16-mixed`) initializing model parameters in half precision instead of fp32 ([#21586](https://github.com/Lightning-AI/pytorch-lightning/pull/21586))
-
 - Fixed `device_mesh` type hint in `FSDPStrategy` to accept a 2-element tuple via the CLI ([#21581](https://github.com/Lightning-AI/pytorch-lightning/pull/21581))
-
-- Fixed ``RichModelSummary`` model size display formatting ([#21467](https://github.com/Lightning-AI/pytorch-lightning/pull/21467))
+- Fixed `RichModelSummary` model size display formatting ([#21467](https://github.com/Lightning-AI/pytorch-lightning/pull/21467))
+- Fixed floating-point precision in `SimpleProfiler` duration aggregation by using `math.fsum` ([#21525](https://github.com/Lightning-AI/pytorch-lightning/pull/21525))
 
 ---