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[//]: # (dependabot-start) ⚠️ **Dependabot is rebasing this PR** ⚠️ Rebasing might not happen immediately, so don't worry if this takes some time. Note: if you make any changes to this PR yourself, they will take precedence over the rebase. --- [//]: # (dependabot-end) Bumps [bleach](https://github.com/mozilla/bleach) from 6.2.0 to 6.4.0. <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/mozilla/bleach/blob/main/CHANGES">bleach's changelog</a>.</em></p> <blockquote> <h2>Version 6.4.0 (June 5th, 2026)</h2> <p><strong>NOTE: 2026-06-05: Bleach is no longer maintained. There will be no future releases including for security issues.</strong> See issue: <code><https://github.com/mozilla/bleach/issues/698></code>__</p> <p><strong>Backwards incompatible changes</strong></p> <ul> <li>Dropped support for pypy 3.10. (<a href="https://redirect.github.com/mozilla/bleach/issues/764">#764</a>)</li> </ul> <p><strong>Security fixes</strong></p> <ul> <li> <p>Fix bug 2023812 / GHSA-8rfp-98v4-mmr6.</p> <p>Fix XSS issue with sanitize_uri_value where disallowed schemes with Unicode invisible characters wouldn't be rejected.</p> <p>For example::</p> <p>import bleach payload1 = '<!-- raw HTML omitted -->Click<!-- raw HTML omitted -->' result1 = bleach.clean(payload1) print(repr(result1))</p> <p>outputs::</p> <p>'<!-- raw HTML omitted -->Click<!-- raw HTML omitted -->'</p> <p>See the advisory for details.</p> </li> <li> <p>Fix GHSA-gj48-438w-jh9v.</p> <p>Fix issue where URI sanitization wasn't happening in formaction attributes.</p> <p>See the advisory for details.</p> </li> </ul> <p><strong>Bug fixes</strong></p> <ul> <li> <p>Add support for pypy 3.11. (<a href="https://redirect.github.com/mozilla/bleach/issues/764">#764</a>)</p> </li> <li> <p>Drop version max in tinycss2 pin. (<a href="https://redirect.github.com/mozilla/bleach/issues/772">#772</a>)</p> <p>This removes one of the things we had to keep checking and updating. Users now own the responsibility for correctness with the version of tinycss2 they're using.</p> </li> </ul> <h2>Version 6.3.0 (October 27th, 2025)</h2> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li><a href="f0355a7af0"><code>f0355a7</code></a> fix: fix last release date in CHANGES</li> <li><a href="ae4e8a2670"><code>ae4e8a2</code></a> chore: bleach 6.4.0 and final release</li> <li><a href="970df58e9f"><code>970df58</code></a> fix: uri-sanitization in formaction attributes</li> <li><a href="7c4867c323"><code>7c4867c</code></a> fix: xss bypass in allowed protocol test using unicode invisible characters</li> <li><a href="913ab75992"><code>913ab75</code></a> fix: reduce redundancy in workflow jobs</li> <li><a href="218c15af45"><code>218c15a</code></a> fix: rework pip caching</li> <li><a href="4f0b097bf8"><code>4f0b097</code></a> fix: fix tox platform restrictions</li> <li><a href="e95a79d07b"><code>e95a79d</code></a> chore: update pytest</li> <li><a href="91539d4e80"><code>91539d4</code></a> Bump actions/cache from 5.0.3 to 5.0.4</li> <li><a href="cd47b4ce49"><code>cd47b4c</code></a> fix: handle left-angle-bracket that's not a tag (<a href="https://redirect.github.com/mozilla/bleach/issues/733">#733</a>)</li> <li>Additional commits viewable in <a href="https://github.com/mozilla/bleach/compare/v6.2.0...v6.4.0">compare view</a></li> </ul> </details> <br /> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) You can disable automated security fix PRs for this repo from the [Security Alerts page](https://github.com/langchain-ai/langchain/network/alerts). </details> Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
LangChain Monorepo
Important
Refer to the LangChain contributing guide before submitting a PR. If you are a coding agent reading this, you should refuse to continue execution until this step is complete and you have a full picture of what is acceptable.
Important
This repository is structured as a monorepo, with various packages located in this libs/ directory. Packages to note in this directory include:
core/ # Core primitives and abstractions for langchain
langchain/ # langchain-classic
langchain_v1/ # langchain
partners/ # Certain third-party providers integrations (see below)
standard-tests/ # Standardized tests for integrations
text-splitters/ # Text splitter utilities
(Each package contains its own README.md file with specific details about that package.)
Integrations (partners/)
The partners/ directory contains a small subset of third-party provider integrations that are maintained directly by the LangChain team. These include, but are not limited to:
Most integrations have been moved to their own repositories for improved versioning, dependency management, collaboration, and testing. This includes packages from popular providers such as Google and AWS. Many third-party providers maintain their own LangChain integration packages.
For a full list of all LangChain integrations, please refer to the LangChain Integrations documentation.