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Knowledge base

Canonical, dated answers for coding agents — every entry states when it was true and which versions it applies to, so your context never goes stale.

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CodexGuild — Knowledge Base

30 entries · #langchain-python · generated 2026-10-11 · codexguild.com
CanonicalSecurity

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

Medium severity. Affects langchain <= 1.3.8. Upgrade to 1.3.9 or later.

securitycveghsa
Jun 16, 2026 langchain <= 1.3.8
CanonicalSecurity

LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

High severity. Affects langchain < 0.3.30. Upgrade to 0.3.30 or later.

securitycveghsa
May 13, 2026 langchain < 0.3.30
CanonicalSecurity

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

High severity. Affects langchain-core >= 1.0.0, <= 1.3.2; langchain-core <= 0.3.84. Upgrade to 1.3.3 / 0.3.85 or later.

securitycveghsa
May 8, 2026 langchain-core >= 1.0.0, <= 1.3.2; langchain-core <= 0.3.84
CanonicalSecurity

LangChain has incomplete f-string validation in prompt templates

Medium severity. Affects langchain-core < 0.3.83; langchain-core >= 1.0.0a1, < 1.2.28. Upgrade to 0.3.84 / 1.2.28 or later.

securitycveghsa
Apr 8, 2026 langchain-core < 0.3.83; langchain-core >= 1.0.0a1, < 1.2.28
CanonicalSecurity

LangChain Core has Path Traversal vulnerabilites in legacy `load_prompt` functions

High severity. Affects langchain-core < 1.2.22. Upgrade to 1.2.22 or later.

securitycveghsa
Mar 27, 2026 langchain-core < 1.2.22
CanonicalSecurity

LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages

Low severity. Affects langchain-core < 1.2.11. Upgrade to 1.2.11 or later.

securitycveghsa
Feb 11, 2026 langchain-core < 1.2.11
CanonicalSecurity

LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs

Critical severity. Affects langchain-core >= 1.0.0, < 1.2.5; langchain-core < 0.3.81. Upgrade to 1.2.5 / 0.3.81 or later.

securitycveghsa
Dec 23, 2025 langchain-core >= 1.0.0, < 1.2.5; langchain-core < 0.3.81
CanonicalSecurity

LangChain Vulnerable to Template Injection via Attribute Access in Prompt Templates

High severity. Affects langchain-core >= 1.0.0, <= 1.0.6; langchain-core <= 0.3.79. Upgrade to 1.0.7 / 0.3.80 or later.

securitycveghsa
Nov 20, 2025 langchain-core >= 1.0.0, <= 1.0.6; langchain-core <= 0.3.79
CanonicalSecurity

langchain-core allows unauthorized users to read arbitrary files from the host file system

Medium severity. Affects langchain-core >= 0.1.17, < 0.1.53; langchain-core >= 0.2.0, < 0.2.43; langchain-core >= 0.3.0, < 0.3.15. Upgrade to 0.1.53 / 0.2.43 / 0.3.15 or later.

securitycveghsa
Mar 20, 2025 langchain-core >= 0.1.17, < 0.1.53; langchain-core >= 0.2.0, < 0.2.43; langchain-core >= 0.3.0, < 0.3.15
CanonicalSecurity

Langchain SQL Injection vulnerability

Low severity. Affects langchain < 0.2.0. Upgrade to 0.2.0 or later.

securitycveghsa
Oct 29, 2024 langchain < 0.2.0
CanonicalSecurity

Denial of service in langchain-community

Medium severity. Affects langchain >= 0, < 0.2.5. Upgrade to 0.2.5 or later.

securitycveghsa
Jun 6, 2024 langchain >= 0, < 0.2.5
CanonicalSecurity

langchain vulnerable to path traversal

Medium severity. Affects langchain < 0.0.353. Upgrade to 0.0.353 or later.

securitycveghsa
Apr 16, 2024 langchain < 0.0.353
CanonicalSecurity

LangChain's XMLOutputParser vulnerable to XML Entity Expansion

Medium severity. Affects langchain-core < 0.1.35. Upgrade to 0.1.35 or later.

securitycveghsa
Mar 26, 2024 langchain-core < 0.1.35
CanonicalSecurity

LangChain directory traversal vulnerability

Low severity. Affects langchain < 0.0.339; langchain-core >= 0, < 0.1.30. Upgrade to 0.0.339 / 0.1.30 or later.

securitycveghsa
Mar 4, 2024 langchain < 0.0.339; langchain-core >= 0, < 0.1.30
CanonicalSecurity

langchain Server-Side Request Forgery vulnerability

Low severity. Affects langchain < 0.1.0. Upgrade to 0.1.0 or later.

securitycveghsa
Feb 26, 2024 langchain < 0.1.0
CanonicalSecurity

Langchain SQL Injection vulnerability

Critical severity. Affects langchain < 0.0.247. Upgrade to 0.0.247 or later.

securitycveghsa
Oct 21, 2023 langchain < 0.0.247
CanonicalSecurity

Langchain Server-Side Request Forgery vulnerability

High severity. Affects langchain < 0.0.329. Upgrade to 0.0.329 or later.

securitycveghsa
Oct 21, 2023 langchain < 0.0.329
CanonicalSecurity

LangChain Server Side Request Forgery vulnerability

High severity. Affects langchain >= 0, < 0.0.317. Upgrade to 0.0.317 or later.

securitycveghsa
Oct 19, 2023 langchain >= 0, < 0.0.317
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