diff --git a/changelog.d/security-katex-0-18.md b/changelog.d/security-katex-0-18.md
new file mode 100644
index 0000000..9dbcfc5
--- /dev/null
+++ b/changelog.d/security-katex-0-18.md
@@ -0,0 +1 @@
+- Bump `katex` 0.16.47 → 0.18.10 via a `package.json` override so the transitive KaTeX dependency is on a patched line and the production `npm audit` gate stays clean.
diff --git a/package-lock.json b/package-lock.json
index 86179c9..92374d4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4497,6 +4497,31 @@
         "@chevrotain/types": "~11.1.2"
       }
     },
+    "node_modules/@theguild/remark-mermaid/node_modules/commander": {
+      "version": "15.0.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-15.0.0.tgz",
+      "integrity": "sha512-z67u4ZhzCL/Tydu1lJARtEZYWbWaN7oYLHbsuzocr6y4N6WZAagG3RQ4FW61V1/0+jImpj293XfrcYnd1qxtPg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=22.12.0"
+      }
+    },
+    "node_modules/@theguild/remark-mermaid/node_modules/katex": {
+      "version": "0.18.10",
+      "resolved": "https://registry.npmjs.org/katex/-/katex-0.18.10.tgz",
+      "integrity": "sha512-/B6p9eY9DX7aHBfpkHdpirDTZ5QH9xTwL9y837PWuzuv41O5jFdqNQwVQEQsimY0/iVNkwBY4+4hMfhQ7d4Dbw==",
+      "funding": [
+        "https://opencollective.com/katex",
+        "https://github.com/sponsors/katex"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "commander": "^15.0.0"
+      },
+      "bin": {
+        "katex": "cli.js"
+      }
+    },
     "node_modules/@theguild/remark-mermaid/node_modules/mermaid": {
       "version": "11.17.2",
       "resolved": "https://registry.npmjs.org/mermaid/-/mermaid-11.17.2.tgz",
@@ -10390,31 +10415,6 @@
         "node": ">=4.0"
       }
     },
-    "node_modules/katex": {
-      "version": "0.16.47",
-      "resolved": "https://registry.npmjs.org/katex/-/katex-0.16.47.tgz",
-      "integrity": "sha512-Eeo8Ys1doU1z+x8AZsPpQu+p/QcZBI5PeOo7QGQdy2x2m0MU/hYagBbGOmXwr5KVbEfVuWv9LpnQWeehogurjg==",
-      "funding": [
-        "https://opencollective.com/katex",
-        "https://github.com/sponsors/katex"
-      ],
-      "license": "MIT",
-      "dependencies": {
-        "commander": "^8.3.0"
-      },
-      "bin": {
-        "katex": "cli.js"
-      }
-    },
-    "node_modules/katex/node_modules/commander": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-8.3.0.tgz",
-      "integrity": "sha512-OkTL9umf+He2DZkUq8f8J9of7yL6RJKI24dVITBmNfZBmri9zYZQrKkuXiKhyfPSu8tUhnVBB1iKXevvnlR4Ww==",
-      "license": "MIT",
-      "engines": {
-        "node": ">= 12"
-      }
-    },
     "node_modules/keyv": {
       "version": "5.6.0",
       "resolved": "https://registry.npmjs.org/keyv/-/keyv-5.6.0.tgz",
@@ -11456,6 +11456,31 @@
         "node": ">=22.12.0"
       }
     },
+    "node_modules/mermaid/node_modules/commander": {
+      "version": "15.0.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-15.0.0.tgz",
+      "integrity": "sha512-z67u4ZhzCL/Tydu1lJARtEZYWbWaN7oYLHbsuzocr6y4N6WZAagG3RQ4FW61V1/0+jImpj293XfrcYnd1qxtPg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=22.12.0"
+      }
+    },
+    "node_modules/mermaid/node_modules/katex": {
+      "version": "0.18.10",
+      "resolved": "https://registry.npmjs.org/katex/-/katex-0.18.10.tgz",
+      "integrity": "sha512-/B6p9eY9DX7aHBfpkHdpirDTZ5QH9xTwL9y837PWuzuv41O5jFdqNQwVQEQsimY0/iVNkwBY4+4hMfhQ7d4Dbw==",
+      "funding": [
+        "https://opencollective.com/katex",
+        "https://github.com/sponsors/katex"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "commander": "^15.0.0"
+      },
+      "bin": {
+        "katex": "cli.js"
+      }
+    },
     "node_modules/meshline": {
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/meshline/-/meshline-3.3.1.tgz",
@@ -11722,6 +11747,31 @@
         "url": "https://opencollective.com/unified"
       }
     },
+    "node_modules/micromark-extension-math/node_modules/commander": {
+      "version": "15.0.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-15.0.0.tgz",
+      "integrity": "sha512-z67u4ZhzCL/Tydu1lJARtEZYWbWaN7oYLHbsuzocr6y4N6WZAagG3RQ4FW61V1/0+jImpj293XfrcYnd1qxtPg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=22.12.0"
+      }
+    },
+    "node_modules/micromark-extension-math/node_modules/katex": {
+      "version": "0.18.10",
+      "resolved": "https://registry.npmjs.org/katex/-/katex-0.18.10.tgz",
+      "integrity": "sha512-/B6p9eY9DX7aHBfpkHdpirDTZ5QH9xTwL9y837PWuzuv41O5jFdqNQwVQEQsimY0/iVNkwBY4+4hMfhQ7d4Dbw==",
+      "funding": [
+        "https://opencollective.com/katex",
+        "https://github.com/sponsors/katex"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "commander": "^15.0.0"
+      },
+      "bin": {
+        "katex": "cli.js"
+      }
+    },
     "node_modules/micromark-extension-mdx-expression": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/micromark-extension-mdx-expression/-/micromark-extension-mdx-expression-3.0.1.tgz",
@@ -12546,6 +12596,15 @@
         "tslib": "^2.8.0"
       }
     },
+    "node_modules/nextra/node_modules/commander": {
+      "version": "15.0.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-15.0.0.tgz",
+      "integrity": "sha512-z67u4ZhzCL/Tydu1lJARtEZYWbWaN7oYLHbsuzocr6y4N6WZAagG3RQ4FW61V1/0+jImpj293XfrcYnd1qxtPg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=22.12.0"
+      }
+    },
     "node_modules/nextra/node_modules/fast-glob": {
       "version": "3.3.3",
       "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.3.3.tgz",
@@ -12574,6 +12633,22 @@
         "node": ">= 6"
       }
     },
+    "node_modules/nextra/node_modules/katex": {
+      "version": "0.18.10",
+      "resolved": "https://registry.npmjs.org/katex/-/katex-0.18.10.tgz",
+      "integrity": "sha512-/B6p9eY9DX7aHBfpkHdpirDTZ5QH9xTwL9y837PWuzuv41O5jFdqNQwVQEQsimY0/iVNkwBY4+4hMfhQ7d4Dbw==",
+      "funding": [
+        "https://opencollective.com/katex",
+        "https://github.com/sponsors/katex"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "commander": "^15.0.0"
+      },
+      "bin": {
+        "katex": "cli.js"
+      }
+    },
     "node_modules/nlcst-to-string": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/nlcst-to-string/-/nlcst-to-string-4.0.0.tgz",
@@ -13565,6 +13640,31 @@
         "url": "https://opencollective.com/unified"
       }
     },
+    "node_modules/rehype-katex/node_modules/commander": {
+      "version": "15.0.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-15.0.0.tgz",
+      "integrity": "sha512-z67u4ZhzCL/Tydu1lJARtEZYWbWaN7oYLHbsuzocr6y4N6WZAagG3RQ4FW61V1/0+jImpj293XfrcYnd1qxtPg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=22.12.0"
+      }
+    },
+    "node_modules/rehype-katex/node_modules/katex": {
+      "version": "0.18.10",
+      "resolved": "https://registry.npmjs.org/katex/-/katex-0.18.10.tgz",
+      "integrity": "sha512-/B6p9eY9DX7aHBfpkHdpirDTZ5QH9xTwL9y837PWuzuv41O5jFdqNQwVQEQsimY0/iVNkwBY4+4hMfhQ7d4Dbw==",
+      "funding": [
+        "https://opencollective.com/katex",
+        "https://github.com/sponsors/katex"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "commander": "^15.0.0"
+      },
+      "bin": {
+        "katex": "cli.js"
+      }
+    },
     "node_modules/rehype-parse": {
       "version": "9.0.1",
       "resolved": "https://registry.npmjs.org/rehype-parse/-/rehype-parse-9.0.1.tgz",
diff --git a/package.json b/package.json
index c6555c4..be6603e 100644
--- a/package.json
+++ b/package.json
@@ -84,6 +84,7 @@
     "postcss": ">=8.5.18",
     "sharp": ">=0.35.3",
     "uuid": ">=11.1.1",
-    "minimatch": "3.1.4"
+    "minimatch": "3.1.4",
+    "katex": "^0.18.2"
   }
 }