diff --git a/pyproject.toml b/pyproject.toml
index 895092ddd9..a8a98da80a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -230,6 +230,9 @@ constraint-dependencies = [
     # CVE-2026-33236, CVE-2026-54293 (HIGH), CVE-2026-33230 (MEDIUM):
     # nltk < 3.10.0 vulnerable; pulled in transitively via crawl4ai, infinity-sdk
     "nltk>=3.10.0",
+    # CVE-2026-0994: protobuf < 5.29.6 vulnerable; pulled in transitively via
+    # google-api-core, googleapis-common-protos, grpcio-status, opentelemetry-proto
+    "protobuf>=5.29.6",
 ]
 exclude-dependencies = [
     # crawl4ai>=0.8.6 depends on unclecode-litellm, which installs the same
diff --git a/uv.lock b/uv.lock
index e395ccf764..e05e76ce9f 100644
--- a/uv.lock
+++ b/uv.lock
@@ -13,6 +13,7 @@ constraints = [
     { name = "lxml", specifier = ">=6.1.1" },
     { name = "lxml-html-clean", specifier = ">=0.4.5" },
     { name = "nltk", specifier = ">=3.10.0" },
+    { name = "protobuf", specifier = ">=5.29.6" },
     { name = "pyasn1", specifier = ">=0.6.4" },
     { name = "trio", specifier = ">=0.26.0", index = "https://pypi.org/simple" },
     { name = "urllib3", specifier = ">=2.7.0" },
@@ -4757,16 +4758,16 @@ wheels = [
 
 [[package]]
 name = "protobuf"
-version = "5.29.5"
+version = "5.29.6"
 source = { registry = "https://mirrors.aliyun.com/pypi/simple" }
-sdist = { url = "https://mirrors.aliyun.com/pypi/packages/43/29/d09e70352e4e88c9c7a198d5645d7277811448d76c23b00345670f7c8a38/protobuf-5.29.5.tar.gz", hash = "sha256:bc1463bafd4b0929216c35f437a8e28731a2b7fe3d98bb77a600efced5a15c84" }
+sdist = { url = "https://mirrors.aliyun.com/pypi/packages/7e/57/394a763c103e0edf87f0938dafcd918d53b4c011dfc5c8ae80f3b0452dbb/protobuf-5.29.6.tar.gz", hash = "sha256:da9ee6a5424b6b30fd5e45c5ea663aef540ca95f9ad99d1e887e819cdf9b8723" }
 wheels = [
-    { url = "https://mirrors.aliyun.com/pypi/packages/5f/11/6e40e9fc5bba02988a214c07cf324595789ca7820160bfd1f8be96e48539/protobuf-5.29.5-cp310-abi3-win32.whl", hash = "sha256:3f1c6468a2cfd102ff4703976138844f78ebd1fb45f49011afc5139e9e283079" },
-    { url = "https://mirrors.aliyun.com/pypi/packages/81/7f/73cefb093e1a2a7c3ffd839e6f9fcafb7a427d300c7f8aef9c64405d8ac6/protobuf-5.29.5-cp310-abi3-win_amd64.whl", hash = "sha256:3f76e3a3675b4a4d867b52e4a5f5b78a2ef9565549d4037e06cf7b0942b1d3fc" },
-    { url = "https://mirrors.aliyun.com/pypi/packages/dd/73/10e1661c21f139f2c6ad9b23040ff36fee624310dc28fba20d33fdae124c/protobuf-5.29.5-cp38-abi3-macosx_10_9_universal2.whl", hash = "sha256:e38c5add5a311f2a6eb0340716ef9b039c1dfa428b28f25a7838ac329204a671" },
-    { url = "https://mirrors.aliyun.com/pypi/packages/6c/04/98f6f8cf5b07ab1294c13f34b4e69b3722bb609c5b701d6c169828f9f8aa/protobuf-5.29.5-cp38-abi3-manylinux2014_aarch64.whl", hash = "sha256:fa18533a299d7ab6c55a238bf8629311439995f2e7eca5caaff08663606e9015" },
-    { url = "https://mirrors.aliyun.com/pypi/packages/85/e4/07c80521879c2d15f321465ac24c70efe2381378c00bf5e56a0f4fbac8cd/protobuf-5.29.5-cp38-abi3-manylinux2014_x86_64.whl", hash = "sha256:63848923da3325e1bf7e9003d680ce6e14b07e55d0473253a690c3a8b8fd6e61" },
-    { url = "https://mirrors.aliyun.com/pypi/packages/7e/cc/7e77861000a0691aeea8f4566e5d3aa716f2b1dece4a24439437e41d3d25/protobuf-5.29.5-py3-none-any.whl", hash = "sha256:6cf42630262c59b2d8de33954443d94b746c952b01434fc58a417fdbd2e84bd5" },
+    { url = "https://mirrors.aliyun.com/pypi/packages/d4/88/9ee58ff7863c479d6f8346686d4636dd4c415b0cbeed7a6a7d0617639c2a/protobuf-5.29.6-cp310-abi3-win32.whl", hash = "sha256:62e8a3114992c7c647bce37dcc93647575fc52d50e48de30c6fcb28a6a291eb1" },
+    { url = "https://mirrors.aliyun.com/pypi/packages/1c/66/2dc736a4d576847134fb6d80bd995c569b13cdc7b815d669050bf0ce2d2c/protobuf-5.29.6-cp310-abi3-win_amd64.whl", hash = "sha256:7e6ad413275be172f67fdee0f43484b6de5a904cc1c3ea9804cb6fe2ff366eda" },
+    { url = "https://mirrors.aliyun.com/pypi/packages/06/db/49b05966fd208ae3f44dcd33837b6243b4915c57561d730a43f881f24dea/protobuf-5.29.6-cp38-abi3-macosx_10_9_universal2.whl", hash = "sha256:b5a169e664b4057183a34bdc424540e86eea47560f3c123a0d64de4e137f9269" },
+    { url = "https://mirrors.aliyun.com/pypi/packages/b7/d7/48cbf6b0c3c39761e47a99cb483405f0fde2be22cf00d71ef316ce52b458/protobuf-5.29.6-cp38-abi3-manylinux2014_aarch64.whl", hash = "sha256:a8866b2cff111f0f863c1b3b9e7572dc7eaea23a7fae27f6fc613304046483e6" },
+    { url = "https://mirrors.aliyun.com/pypi/packages/e3/dd/cadd6ec43069247d91f6345fa7a0d2858bef6af366dbd7ba8f05d2c77d3b/protobuf-5.29.6-cp38-abi3-manylinux2014_x86_64.whl", hash = "sha256:e3387f44798ac1106af0233c04fb8abf543772ff241169946f698b3a9a3d3ab9" },
+    { url = "https://mirrors.aliyun.com/pypi/packages/5a/cb/e3065b447186cb70aa65acc70c86baf482d82bf75625bf5a2c4f6919c6a3/protobuf-5.29.6-py3-none-any.whl", hash = "sha256:6b9edb641441b2da9fa8f428760fc136a49cf97a52076010cf22a2ff73438a86" },
 ]
 
 [[package]]