diff --git a/CHANGELOG.md b/CHANGELOG.md
index 394e45223..50effa64d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,15 +4,24 @@ All notable changes to this project will be documented in this file. Dates are d
 
 Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
+#### [1.9.2](https://github.com/rdkcentral/telemetry/compare/1.9.1...1.9.2)
+
+> 4 May 2026
+
+- RDKB-64644: Potential Fix for SE051 ENGINE memory leak in telemetry HTTP pool [`#360`](https://github.com/rdkcentral/telemetry/pull/360)
+- RDKEMW-15199:[SECVULN] Command injection via /opt/.telemetry/dca_temp… [`#355`](https://github.com/rdkcentral/telemetry/pull/355)
+
 #### [1.9.1](https://github.com/rdkcentral/telemetry/compare/1.9.0...1.9.1)
 
-> 29 April 2026
+> 28 April 2026
 
 - RDKB-64487: TSAN fixes for various issues [`#350`](https://github.com/rdkcentral/telemetry/pull/350)
 - RDKB-64487: Code changes for thread hardening and safety under concurrent load [`#345`](https://github.com/rdkcentral/telemetry/pull/345)
 - RDKB-64487: Code changes for Mutex locking and deadlock prevention [`#338`](https://github.com/rdkcentral/telemetry/pull/338)
 - RDKEMW-16851: Fix for top log markers and the polling frequency [`#341`](https://github.com/rdkcentral/telemetry/pull/341)
 - Adding agentic skills for code reviews [`#323`](https://github.com/rdkcentral/telemetry/pull/323)
+- Changelog updates for 1.9.1 release [`1861d67`](https://github.com/rdkcentral/telemetry/commit/1861d67be43018e5dcc10f61bebd3d31d08244ec)
+- Changelog updates for 1.9.1 release [`4675135`](https://github.com/rdkcentral/telemetry/commit/467513553c6fac2d63cf730ca4980c595ff355db)
 
 #### [1.9.0](https://github.com/rdkcentral/telemetry/compare/1.8.8...1.9.0)
 
diff --git a/source/protocol/http/multicurlinterface.c b/source/protocol/http/multicurlinterface.c
index 5e273a083..fe49ecffd 100644
--- a/source/protocol/http/multicurlinterface.c
+++ b/source/protocol/http/multicurlinterface.c
@@ -268,7 +268,11 @@ T2ERROR init_connection_pool()
 #endif
 
         // Connection reuse settings
-        CURL_SETOPT_CHECK(pool_entries[i].easy_handle, CURLOPT_FORBID_REUSE, 0L);
+        //Disable connection reuse (FORBID_REUSE=1) so that
+        // curl tears down the TLS session after each request.  This causes
+        // OpenSSL to call SSL_CTX_free → EC_KEY_free → ENGINE_finish through
+        // its own reference counting, releasing the SE051 hardware session state.
+        CURL_SETOPT_CHECK(pool_entries[i].easy_handle, CURLOPT_FORBID_REUSE, 1L);
         CURL_SETOPT_CHECK(pool_entries[i].easy_handle, CURLOPT_FRESH_CONNECT, 0L);
 
         // Socket options
@@ -620,6 +624,9 @@ T2ERROR http_pool_get(const char *url, char **response_data, bool enable_file_ou
                 if(curl_code != CURLE_OK || http_code != 200)
                 {
                     T2Error("%s: Failed to establish connection using xPKI certificate: %s, Curl failed : %d\n", __func__, pCertFile, curl_code);
+                    // Drain OpenSSL error queue between retries to prevent
+                    // ENGINE-internal error state accumulation (HROT/SE051).
+                    ERR_clear_error();
                 }
                 else
                 {
@@ -815,9 +822,6 @@ T2ERROR http_pool_get(const char *url, char **response_data, bool enable_file_ou
     }
 #endif
 
-    // Important Note: When using LIBRDKCERTSEL_BUILD, pCertURI and pCertPC are owned by the
-    // cert selector object and are freed when rdkcertselector_free() is called
-
     // Clear OpenSSL per-thread error queue.
     // Every curl_easy_perform() may push records onto the per-thread ERR_STATE
     // list on any TLS error (cert verify failure, connection reset, timeout).
@@ -825,6 +829,8 @@ T2ERROR http_pool_get(const char *url, char **response_data, bool enable_file_ou
     // ERR_clear_error() is thread-safe since OpenSSL 1.1.0.
     ERR_clear_error();
 
+    // Important Note: When using LIBRDKCERTSEL_BUILD, pCertURI and pCertPC are owned by the
+    // cert selector object and are freed when rdkcertselector_free() is called
     release_pool_handle(idx);
 
     T2Debug("%s ++out\n", __FUNCTION__);
@@ -1013,6 +1019,9 @@ T2ERROR http_pool_post(const char *url, const char *payload)
                 if(curl_code != CURLE_OK || http_code != 200)
                 {
                     T2Error("%s: Failed to establish connection using xPKI certificate: %s, curl failed: %d (entry %d)\n", __func__, pCertFile, curl_code, idx);
+                    // Drain OpenSSL error queue between retries to prevent
+                    // ENGINE-internal error state accumulation (HROT/SE051).
+                    ERR_clear_error();
                 }
                 else
                 {
diff --git a/source/t2parser/t2parser.c b/source/t2parser/t2parser.c
index 808cc3993..fbf9b82a2 100644
--- a/source/t2parser/t2parser.c
+++ b/source/t2parser/t2parser.c
@@ -311,9 +311,18 @@ static T2ERROR addParameter(Profile *profile, const char* name, const char* ref,
     {
 
         // T2Debug("Adding Grep Marker :: Param/Marker Name : %s ref/pattern/Comp : %s fileName : %s skipFreq : %d\n", name, ref, fileName, skipFreq);
-
         if(fileName != NULL && strncmp("top_log.txt", fileName, sizeof("top_log.txt")) == 0)
         {
+            if(ref == NULL)
+            {
+                T2Error("Search string can't be null for top markers\n");
+                return T2ERROR_FAILURE;
+            }
+            if(sanitize_string(ref) != 0)
+            {
+                T2Error("Parameter %s can't be added as invalid search string encountered\n", ref);
+                return T2ERROR_FAILURE;
+            }
             T2Debug("This is a TopMarker name :%s  and value: %s add it to topmarker list \n", name, ref);
             TopMarker *tMarker = (TopMarker *) malloc(sizeof(TopMarker));
             if(tMarker == NULL)
diff --git a/source/t2parser/t2parserxconf.c b/source/t2parser/t2parserxconf.c
index afa19f1a6..8e39cbe56 100644
--- a/source/t2parser/t2parserxconf.c
+++ b/source/t2parser/t2parserxconf.c
@@ -21,6 +21,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <ctype.h>
 
 #include "t2parserxconf.h"
 #include "xconfclient.h"
@@ -129,6 +130,16 @@ static T2ERROR addParameter(ProfileXConf *profile, const char* name, const char*
             char *splitSuffix = NULL;
             char *accumulateSuffix = NULL;
             // T2Debug("Adding Grep Marker :: Param/Marker Name : %s ref/pattern/Comp : %s fileName : %s skipFreq : %d\n", name, ref, fileName, skipFreq);
+            if(ref == NULL)
+            {
+                T2Error("Search string can't be null for top markers\n");
+                return T2ERROR_FAILURE;
+            }
+            if(sanitize_string(ref) != 0)
+            {
+                T2Error("Parameter %s can't be added as invalid search string encountered\n", ref);
+                return T2ERROR_FAILURE;
+            }
             TopMarker *tMarker = (TopMarker *)malloc(sizeof(TopMarker));
             memset(tMarker, 0, sizeof(TopMarker));
             tMarker->markerName = strdup(name);
diff --git a/source/utils/t2common.c b/source/utils/t2common.c
index b125d0f74..85f146ad4 100644
--- a/source/utils/t2common.c
+++ b/source/utils/t2common.c
@@ -301,3 +301,19 @@ bool isWhoAmiEnabled(void)
 {
     return whoami_support;
 }
+
+int sanitize_string(const char *str)
+{
+    const char *src = str;
+
+    while (*src)
+    {
+        if (!(isalnum((unsigned char)*src) || *src == '.' || *src == '-' || *src == '_'))
+        {
+            T2Error("Invalid search string configuration. Rejecting parameter due to invalid characters\n");
+            return -1;
+        }
+        src++;
+    }
+    return 0;
+}
diff --git a/source/utils/t2common.h b/source/utils/t2common.h
index 9ef9be737..d1412aca6 100644
--- a/source/utils/t2common.h
+++ b/source/utils/t2common.h
@@ -167,4 +167,6 @@ void initWhoamiSupport(void);
 
 bool isWhoAmiEnabled(void);
 
+int sanitize_string(const char *str);
+
 #endif /* _T2COMMON_H_ */