diff --git a/.buildkite/pipelines/intake.yml b/.buildkite/pipelines/intake.yml
index 8b5d77c78b7da..659b2cb4d88f6 100644
--- a/.buildkite/pipelines/intake.yml
+++ b/.buildkite/pipelines/intake.yml
@@ -56,7 +56,7 @@ steps:
         timeout_in_minutes: 300
         matrix:
           setup:
-            BWC_VERSION: ["7.17.26", "8.16.2", "8.17.0"]
+            BWC_VERSION: ["7.17.27", "8.16.2", "8.17.0"]
         agents:
           provider: gcp
           image: family/elasticsearch-ubuntu-2004
diff --git a/.buildkite/pipelines/periodic-packaging.yml b/.buildkite/pipelines/periodic-packaging.yml
index 993ccf19f543a..11e2ca7d3bf03 100644
--- a/.buildkite/pipelines/periodic-packaging.yml
+++ b/.buildkite/pipelines/periodic-packaging.yml
@@ -303,8 +303,8 @@ steps:
         env:
           BWC_VERSION: 7.16.3
 
-      - label: "{{matrix.image}} / 7.17.26 / packaging-tests-upgrade"
-        command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v7.17.26
+      - label: "{{matrix.image}} / 7.17.27 / packaging-tests-upgrade"
+        command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v7.17.27
         timeout_in_minutes: 300
         matrix:
           setup:
@@ -317,7 +317,7 @@ steps:
           machineType: custom-16-32768
           buildDirectory: /dev/shm/bk
         env:
-          BWC_VERSION: 7.17.26
+          BWC_VERSION: 7.17.27
 
       - label: "{{matrix.image}} / 8.0.1 / packaging-tests-upgrade"
         command: ./.ci/scripts/packaging-test.sh -Dbwc.checkout.align=true destructiveDistroUpgradeTest.v8.0.1
diff --git a/.buildkite/pipelines/periodic.yml b/.buildkite/pipelines/periodic.yml
index ea15f5e5452ca..2cfcd994c0b42 100644
--- a/.buildkite/pipelines/periodic.yml
+++ b/.buildkite/pipelines/periodic.yml
@@ -325,8 +325,8 @@ steps:
             - signal_reason: agent_stop
               limit: 3
 
-      - label: 7.17.26 / bwc
-        command: .ci/scripts/run-gradle.sh -Dbwc.checkout.align=true v7.17.26#bwcTest
+      - label: 7.17.27 / bwc
+        command: .ci/scripts/run-gradle.sh -Dbwc.checkout.align=true v7.17.27#bwcTest
         timeout_in_minutes: 300
         agents:
           provider: gcp
@@ -335,7 +335,7 @@ steps:
           buildDirectory: /dev/shm/bk
           preemptible: true
         env:
-          BWC_VERSION: 7.17.26
+          BWC_VERSION: 7.17.27
         retry:
           automatic:
             - exit_status: "-1"
@@ -752,7 +752,7 @@ steps:
           setup:
             ES_RUNTIME_JAVA:
               - openjdk17
-            BWC_VERSION: ["7.17.26", "8.16.2", "8.17.0"]
+            BWC_VERSION: ["7.17.27", "8.16.2", "8.17.0"]
         agents:
           provider: gcp
           image: family/elasticsearch-ubuntu-2004
@@ -800,7 +800,7 @@ steps:
               - openjdk21
               - openjdk22
               - openjdk23
-            BWC_VERSION: ["7.17.26", "8.16.2", "8.17.0"]
+            BWC_VERSION: ["7.17.27", "8.16.2", "8.17.0"]
         agents:
           provider: gcp
           image: family/elasticsearch-ubuntu-2004
diff --git a/.ci/bwcVersions b/.ci/bwcVersions
index 5e0c6ef847707..9577df50659da 100644
--- a/.ci/bwcVersions
+++ b/.ci/bwcVersions
@@ -16,7 +16,7 @@ BWC_VERSION:
   - "7.14.2"
   - "7.15.2"
   - "7.16.3"
-  - "7.17.26"
+  - "7.17.27"
   - "8.0.1"
   - "8.1.3"
   - "8.2.3"
diff --git a/.ci/snapshotBwcVersions b/.ci/snapshotBwcVersions
index 1988b58d579af..e9f42cfa4e062 100644
--- a/.ci/snapshotBwcVersions
+++ b/.ci/snapshotBwcVersions
@@ -1,4 +1,4 @@
 BWC_VERSION:
-  - "7.17.26"
+  - "7.17.27"
   - "8.16.2"
   - "8.17.0"
diff --git a/server/src/main/java/org/elasticsearch/Version.java b/server/src/main/java/org/elasticsearch/Version.java
index 00dc3845497e6..8d1dd8ec1f398 100644
--- a/server/src/main/java/org/elasticsearch/Version.java
+++ b/server/src/main/java/org/elasticsearch/Version.java
@@ -127,6 +127,7 @@ public class Version implements VersionId<Version>, ToXContentFragment {
     public static final Version V_7_17_24 = new Version(7_17_24_99);
     public static final Version V_7_17_25 = new Version(7_17_25_99);
     public static final Version V_7_17_26 = new Version(7_17_26_99);
+    public static final Version V_7_17_27 = new Version(7_17_27_99);
 
     public static final Version V_8_0_0 = new Version(8_00_00_99);
     public static final Version V_8_0_1 = new Version(8_00_01_99);
diff --git a/server/src/main/resources/org/elasticsearch/TransportVersions.csv b/server/src/main/resources/org/elasticsearch/TransportVersions.csv
index 678cf50866595..2cdb0a4879f87 100644
--- a/server/src/main/resources/org/elasticsearch/TransportVersions.csv
+++ b/server/src/main/resources/org/elasticsearch/TransportVersions.csv
@@ -73,6 +73,7 @@
 7.17.23,7172399
 7.17.24,7172499
 7.17.25,7172599
+7.17.26,7172699
 8.0.0,8000099
 8.0.1,8000199
 8.1.0,8010099
diff --git a/server/src/main/resources/org/elasticsearch/index/IndexVersions.csv b/server/src/main/resources/org/elasticsearch/index/IndexVersions.csv
index 332dff2bd83b6..58d0db5f6c3ef 100644
--- a/server/src/main/resources/org/elasticsearch/index/IndexVersions.csv
+++ b/server/src/main/resources/org/elasticsearch/index/IndexVersions.csv
@@ -73,6 +73,7 @@
 7.17.23,7172399
 7.17.24,7172499
 7.17.25,7172599
+7.17.26,7172699
 8.0.0,8000099
 8.0.1,8000199
 8.1.0,8010099