diff --git a/release_docs/CHANGELOG.md b/release_docs/CHANGELOG.md
index d08176bc677..ab1514f77a1 100644
--- a/release_docs/CHANGELOG.md
+++ b/release_docs/CHANGELOG.md
@@ -557,6 +557,20 @@ Added Fortran wrapper h5fdsubfiling_get_file_mapping_f() for the subfiling file
 
 ## Library
 
+### Security issue CVE-2025-6817
+
+   A malformed file caused H5C__load_entry() to attempt to allocate a very large
+   buffer, resulting in a crash.  This issue is indirectly fixed by PR #5710.
+
+   Fixes GitHub issue #5572
+
+### Security issue CVE-2025-6818
+
+   A malformed file caused a heap-buffer-overflow in H5O__chunk_protect() and
+   the issue is indirectly fixed by PR #5829.
+
+   Fixes GitHub issue #5573
+
 ### Fixed security issue CVE-2025-2915 and OSV-2024-381
 
    Fixed a heap-based buffer overflow in H5F__accum_free caused by an integer overflow when calculating new_accum_size. Added validation in H5O__mdci_decode to detect and reject invalid values early, preventing the overflow condition.