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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 [pyasn1](https://github.com/pyasn1/pyasn1) from 0.6.2 to 0.6.3. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/pyasn1/pyasn1/releases">pyasn1's releases</a>.</em></p> <blockquote> <h2>Release 0.6.3</h2> <p>It's a minor release.</p> <ul> <li>Added nesting depth limit to ASN.1 decoder to prevent stack overflow from deeply nested structures (CVE-2026-30922).</li> <li>Fixed OverflowError from oversized BER length field.</li> <li>Fixed DeprecationWarning stacklevel for deprecated attributes.</li> <li>Fixed asDateTime incorrect fractional seconds parsing.</li> </ul> <p>All changes are noted in the <a href="https://github.com/pyasn1/pyasn1/blob/master/CHANGES.rst">CHANGELOG</a>.</p> </blockquote> </details> <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/pyasn1/pyasn1/blob/main/CHANGES.rst">pyasn1's changelog</a>.</em></p> <blockquote> <h2>Revision 0.6.3, released 16-03-2026</h2> <ul> <li>CVE-2026-30922 (GHSA-jr27-m4p2-rc6r): Added nesting depth limit to ASN.1 decoder to prevent stack overflow from deeply nested structures (thanks for reporting, romanticpragmatism)</li> <li>Fixed OverflowError from oversized BER length field [issue <a href="https://redirect.github.com/pyasn1/pyasn1/issues/54">#54</a>](<a href="https://redirect.github.com/pyasn1/pyasn1/issues/54">pyasn1/pyasn1#54</a>) [pr <a href="https://redirect.github.com/pyasn1/pyasn1/issues/100">#100</a>](<a href="https://redirect.github.com/pyasn1/pyasn1/pull/100">pyasn1/pyasn1#100</a>)</li> <li>Fixed DeprecationWarning stacklevel for deprecated attributes [issue <a href="https://redirect.github.com/pyasn1/pyasn1/issues/86">#86</a>](<a href="https://redirect.github.com/pyasn1/pyasn1/issues/86">pyasn1/pyasn1#86</a>) [pr <a href="https://redirect.github.com/pyasn1/pyasn1/issues/101">#101</a>](<a href="https://redirect.github.com/pyasn1/pyasn1/pull/101">pyasn1/pyasn1#101</a>)</li> <li>Fixed asDateTime incorrect fractional seconds parsing [issue <a href="https://redirect.github.com/pyasn1/pyasn1/issues/81">#81</a>](<a href="https://redirect.github.com/pyasn1/pyasn1/issues/81">pyasn1/pyasn1#81</a>) [pr <a href="https://redirect.github.com/pyasn1/pyasn1/issues/102">#102</a>](<a href="https://redirect.github.com/pyasn1/pyasn1/pull/102">pyasn1/pyasn1#102</a>)</li> </ul> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="af65c3b92e"><code>af65c3b</code></a> Prepare release 0.6.3</li> <li><a href="5a49bd1fe9"><code>5a49bd1</code></a> Merge commit from fork</li> <li><a href="5494ba43f7"><code>5494ba4</code></a> Fix asDateTime incorrect fractional seconds parsing (<a href="https://redirect.github.com/pyasn1/pyasn1/issues/102">#102</a>)</li> <li><a href="71f486e6c3"><code>71f486e</code></a> Fix DeprecationWarning stacklevel for deprecated attributes (<a href="https://redirect.github.com/pyasn1/pyasn1/issues/101">#101</a>)</li> <li><a href="d7cb42dcaa"><code>d7cb42d</code></a> Fix OverflowError from oversized BER length field (<a href="https://redirect.github.com/pyasn1/pyasn1/issues/100">#100</a>)</li> <li>See full diff in <a href="https://github.com/pyasn1/pyasn1/compare/v0.6.2...v0.6.3">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 Classic
Looking for the JS/TS version? Check out LangChain.js.
To help you ship LangChain apps to production faster, check out LangSmith. LangSmith is a unified developer platform for building, testing, and monitoring LLM applications.
Quick Install
pip install langchain-classic
🤔 What is this?
Legacy chains, langchain-community re-exports, indexing API, deprecated functionality, and more.
In most cases, you should be using the main langchain package.
📖 Documentation
For full documentation, see the API reference. For conceptual guides, tutorials, and examples on using LangChain, see the LangChain Docs.
📕 Releases & Versioning
See our Releases and Versioning policies.
💁 Contributing
As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.
For detailed information on how to contribute, see the Contributing Guide.