langchain==1.2.14

LangChain Releases / 3/31/2026

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Key Points

langchain v1.2.14 was released as a follow-up to v1.2.13, including fixes, chores, and performance improvements.
The update bumps pygments to >=2.20.0 across packages in response to CVE-2026-4539.
Multiple changes address recursion-limit handling for create_agent, including updating and overriding runtime recursion limits and adding test coverage.
A performance improvement reduces initialization speed by about 15%.
Infrastructure/linting and dependency maintenance were also included, such as correcting lint diff paths and bumping cryptography in the langchain v1 library.

Changes since langchain==1.2.13

release(langchain): 1.2.14 (#36396)
chore: pygments>=2.20.0 across all packages (CVE-2026-4539) (#36385)
test(langchain): cover runtime recursion limit override in create_agent (#36376)
perf(langchain): reduce init speed by 15% (#36375)
fix(langchain): update recursion limit for create_agent (#36351)
fix(infra): correct lint_diff relative paths in package makefiles (#36333)
chore: bump cryptography from 46.0.5 to 46.0.6 in /libs/langchain_v1 (#36324)
fix(langchain): recognize ChatAnthropicVertex in _get_approximate_token_counter (#36320)
chore(langchain): remove unnecessary description for toods list as a group (#36315)
chore(langchain): add async implementation to todolist and test (#36313)
chore(langchain): speed up todo list middleware init (#36311)
chore: bump requests from 2.32.5 to 2.33.0 in /libs/langchain_v1 (#36241)
chore(partners): bump langchain-core min to 1.2.21 (#36183)
fix(core,model-profiles): add missing ModelProfile fields, warn on schema drift (#36129)
fix(langchain,langchain-classic): update model provider classes for Azure AI Foundry (#35812)