CVE-2026-72848

SitemapLoader.parsesitemap in langchaincommunity/documentloaders/sitemap.py applies the documented restricttosamedomain control only to leaf url entries. The loop over url elements filters cross-domain locations, but the loop over nested sitemap elements passes the child loc straight to...

CVE-2026-72848 langchain-community SitemapLoader Does Not Apply restrict_to_same_domain to Nested Sitemap Index Entries, Allowing Server-Side Request Forgery

SitemapLoader.parsesitemap in langchaincommunity/documentloaders/sitemap.py applies the documented restricttosamedomain control only to leaf url entries. The loop over url elements filters cross-domain locations, but the loop over nested sitemap elements passes the child loc straight to...

CVE-2026-72848 langchain-community SitemapLoader Does Not Apply restrict_to_same_domain to Nested Sitemap Index Entries, Allowing Server-Side Request Forgery

SitemapLoader.parsesitemap in langchaincommunity/documentloaders/sitemap.py applies the documented restricttosamedomain control only to leaf url entries. The loop over url elements filters cross-domain locations, but the loop over nested sitemap elements passes the child loc straight to...

CVE-2026-72848

CVE-2026-72848 is a Server-Side Request Forgery (SSRF) in langchain_community 's SitemapLoader.parse_sitemap (document_loaders/sitemap.py). The restrict_to_same_domain guard is applied only to leaf URL entries; nested sitemap index entries bypass it entirely, passing the child loc directly to Web...

PT-2026-79263

Name of the Vulnerable Software and Affected Versions langchain-community affected versions not specified Description The SitemapLoader.parse sitemap function in langchain community/document loaders/sitemap.py fails to apply the restrict to same domain control to nested sitemap entries. While lea...

ROOT-APP-PYPI-GHSA-GR75-JV2W-4656 GHSA-gr75-jv2w-4656 in langchain - Patched by Root

Root has patched GHSA-gr75-jv2w-4656 in the langchain package for Root:PyPI. Multiple fixed versions available...

ROOT-APP-NPM-CVE-2026-27795 CVE-2026-27795 in @langchain/community - Patched by Root

Root has patched CVE-2026-27795 in the @langchain/community package for Root:npm. Multiple fixed versions available...

Security Bulletin: IBM Watson Speech Services Cartridge is vulnerable to incomplete validation in LangChain [CVE-2026-40087]

Summary IBM Watson Speech Services Cartridge is vulnerable to incomplete validation in LangChain, due to flaws in the f-string prompt-template. CVE-2026-40087. LangChain is used in our speech runtimes. This vulnerability has been addressed. Please read the details for remediation below...

PYSEC-2026-2556 LangChain: Path traversal and sandbox escape in LangChain file-search middleware and loaders

Summary Several LangChain components that resolve filesystem paths or expand search patterns do not consistently confine the resolved path to the intended root directory. Affected behaviors include: a file-search agent middleware that validates a starting directory but not the search pattern or t...

PYSEC-2026-2564 LangChain vulnerable to unsafe deserialization of attacker-controlled objects through overly broad `load()` allowlists

LangChain contains older runtime code paths that deserialize run inputs, run outputs, or other application-controlled payloads using overly broad object allowlists. These paths may call load with allowedobjects="all". This does not enable arbitrary Python object deserialization, but it does allow...

PYSEC-2026-2557 Langchain-Chatchat Uses Insufficiently Random Values

A vulnerability was found in chatchat-space Langchain-Chatchat up to 0.3.1.3. The affected element is the function getfileid of the file libs/chatchat-server/chatchat/server/apiserver/openairoutes.py of the component Uploaded File Handler. Performing a manipulation results in insufficiently rando...

PYSEC-2026-2558 Langchain-Chatchat Uses a Broken or Risky Cryptographic Algorithm

A flaw has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. This issue affects the function PIL.Image.tobytes of the file libs/chatchat-server/chatchat/webuipages/dialogue/dialogue.py of the component Vision Chat Paste Image Handler. This manipulation of the argument...

PYSEC-2026-2559 Langchain-Chatchat has a Race Condition in its OpenAI-Compatible File Upload API

A vulnerability has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. Impacted is the function files of the file libs/chatchat-server/chatchat/server/apiserver/openairoutes.py of the component OpenAI-Compatible File Upload API. Such manipulation of the argument file.filename leads to...

PYSEC-2026-2561 Denial of service in langchain-community

Denial of service in SitemapLoader Document Loader in the langchain-community package, affecting versions below 0.2.5. The parsesitemap method, responsible for parsing sitemaps and extracting URLs, lacks a mechanism to prevent infinite recursion when a sitemap URL refers to the current sitemap...

PYSEC-2026-1070 Malicious code in langchain-core-mcp (PyPI)

Part of the "Hades" wave of the Shai-Hulud supply-chain campaign. On 2026-06-08, malicious phantom releases of langchain-core-mcp were published to PyPI using stolen credentials. The package executes a bundled JavaScript payload via the Bun runtime on import that harvests and exfiltrates...

PYSEC-2026-1518 LangChain Vulnerable to Template Injection via Attribute Access in Prompt Templates

Context A template injection vulnerability exists in LangChain's prompt template system that allows attackers to access Python object internals through template syntax. This vulnerability affects applications that accept untrusted template strings not just template variables in ChatPromptTemplate...

PYSEC-2026-1520 LangChain Text Splitters is vulnerable to XML External Entity (XXE) attacks due to unsafe XSLT parsing

The HTMLSectionSplitter class in langchain-text-splitters is vulnerable to XML External Entity XXE attacks due to unsafe XSLT parsing. This vulnerability arises because the class allows the use of arbitrary XSLT stylesheets, which are parsed using lxml.etree.parse and lxml.etree.XSLT without any...

PYSEC-2026-1515 Langchain Community Vulnerable to XML External Entity (XXE) Attacks

The langchain-ai/langchain project, specifically the EverNoteLoader component, is vulnerable to XML External Entity XXE attacks due to insecure XML parsing. The vulnerability arises from the use of etree.iterparse without disabling external entity references, which can lead to sensitive informati...

PYSEC-2026-1512 Langchain-Chatchat vulnerable to path traversal

A vulnerability, which was classified as critical, has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This issue affects some unknown processing of the file /v1/file. The manipulation of the argument flag leads to path traversal. The exploit has been disclosed to the public and may ...

PYSEC-2026-1511 Langchain-Chatchat vulnerable to path traversal

A vulnerability classified as problematic was found in chatchat-space Langchain-Chatchat up to 0.3.1. This vulnerability affects unknown code of the file /v1/files?purpose=assistants. The manipulation leads to path traversal. The attack can be initiated remotely. The exploit has been disclosed to...