diff --git a/extensions/business/cybersec/red_mesh/constants.py b/extensions/business/cybersec/red_mesh/constants.py
index 5086b460..adb16a81 100644
--- a/extensions/business/cybersec/red_mesh/constants.py
+++ b/extensions/business/cybersec/red_mesh/constants.py
@@ -342,7 +342,7 @@ def resolve_target_response_timeout(timeout_profile, standard_timeout):
 # The backend release, recorded in every JobConfig at launch so a report names
 # the scanner that produced it. `pentester_api_01.__VER__` must equal it (a test
 # guards the pair; the plugin loader reads the literal there).
-REDMESH_BACKEND_VERSION = "0.13.0"
+REDMESH_BACKEND_VERSION = "0.13.1"
 
 # =====================================================================
 # Risk score computation
diff --git a/extensions/business/cybersec/red_mesh/pentester_api_01.py b/extensions/business/cybersec/red_mesh/pentester_api_01.py
index 132043f8..600ed348 100644
--- a/extensions/business/cybersec/red_mesh/pentester_api_01.py
+++ b/extensions/business/cybersec/red_mesh/pentester_api_01.py
@@ -572,7 +572,7 @@ def _run_manual_analysis_worker(work: _ManualAnalysisWork) -> _ManualAnalysisOut
   return _ManualAnalysisWorker(work).run()
 
 
-__VER__ = '0.13.0'
+__VER__ = '0.13.1'
 
 
 _CONFIG = {
diff --git a/extensions/business/cybersec/red_mesh/tests/test_api.py b/extensions/business/cybersec/red_mesh/tests/test_api.py
index 09b7ee89..e16a275e 100644
--- a/extensions/business/cybersec/red_mesh/tests/test_api.py
+++ b/extensions/business/cybersec/red_mesh/tests/test_api.py
@@ -390,9 +390,9 @@ def test_launch_records_the_backend_release_that_ran_the_scan(self):
     self._launch(plugin)
     from extensions.business.cybersec.red_mesh.models import JobConfig
     config_dict = plugin.r1fs.add_json.call_args_list[0][0][0]
-    self.assertEqual(config_dict["redmesh_release"], {"backend": "0.13.0"})
+    self.assertEqual(config_dict["redmesh_release"], {"backend": "0.13.1"})
     restored = JobConfig.from_dict(config_dict).to_dict()
-    self.assertEqual(restored["redmesh_release"], {"backend": "0.13.0"})
+    self.assertEqual(restored["redmesh_release"], {"backend": "0.13.1"})
 
   def test_launch_records_the_console_and_report_pipeline_it_was_sent(self):
     """RM-103 item 12: the release names all three deployables. Only the
diff --git a/extensions/business/cybersec/red_mesh/tests/test_csrf_finding_identity.py b/extensions/business/cybersec/red_mesh/tests/test_csrf_finding_identity.py
index 0155e012..fad9b798 100644
--- a/extensions/business/cybersec/red_mesh/tests/test_csrf_finding_identity.py
+++ b/extensions/business/cybersec/red_mesh/tests/test_csrf_finding_identity.py
@@ -92,6 +92,23 @@ def test_forms_posting_to_one_place_are_one_finding(self):
     sharing an id."""
     self.assertEqual(len(self._run({"/": _page(_form(), _form())})), 1)
 
+  def test_path_parameters_are_dropped_per_segment_not_at_the_first_semicolon(self):
+    findings = self._run({"/": _page(
+      _form("/account;jsessionid=ABC/delete"), _form("/account;jsessionid=ABC/update"),
+    )})
+    self.assertEqual(len({f["finding_id"] for f in findings}), 2)
+    self.assertEqual(
+      sorted(f["affected_assets"][0]["parameter"] for f in findings),
+      ["/account/delete", "/account/update"],
+    )
+
+  def test_a_session_id_in_a_middle_segment_does_not_move_the_id(self):
+    [clean] = self._run({"/": _page(_form("/a/b"))})
+    for volatile in ("/a;jsessionid=X/b", "/a;jsessionid=Y/b;v=2"):
+      with self.subTest(action=volatile):
+        [finding] = self._run({"/": _page(_form(volatile))})
+        self.assertEqual(finding["finding_id"], clean["finding_id"])
+
   def test_actions_differing_only_in_a_query_are_one_finding(self):
     findings = self._run({"/": _page(_form("/search?t=1"), _form("/search?t=2"))})
     self.assertEqual(len(findings), 1)
diff --git a/extensions/business/cybersec/red_mesh/worker/web/hardening.py b/extensions/business/cybersec/red_mesh/worker/web/hardening.py
index 00b0d203..1b9a2d69 100644
--- a/extensions/business/cybersec/red_mesh/worker/web/hardening.py
+++ b/extensions/business/cybersec/red_mesh/worker/web/hardening.py
@@ -540,11 +540,14 @@ def _csrf_form_action(cls, form_html, path):
   @staticmethod
   def _csrf_identity_action(action, path):
     """The action as an identity input: entities decoded, then the query,
-    fragment and `;param` path parameters dropped, since a cache-buster or a
-    session id there would hand the finding a new id on every run. The raw
-    action stays in `evidence`."""
+    fragment and each segment's `;param` path parameters dropped, since a
+    cache-buster or a session id there would hand the finding a new id on
+    every run. The segments after a `;param` stay: `/a;jsessionid=X/delete`
+    and `/a;jsessionid=X/update` are two endpoints. The raw action stays in
+    `evidence`."""
     decoded = _html_unescape(action)
-    stable = _re.split(r"[?#;]", decoded, maxsplit=1)[0].strip()
+    stable = _re.split(r"[?#]", decoded, maxsplit=1)[0]
+    stable = _re.sub(r";[^/]*", "", stable).strip()
     return stable or path
 
 
diff --git a/ver.py b/ver.py
index 7096a618..67f9136e 100644
--- a/ver.py
+++ b/ver.py
@@ -1 +1 @@
-__VER__ = '2.10.480'
+__VER__ = '2.10.481'