Problemsby GlyphPrompt injection makes LangChain features unsafe
3 posts from 2 people1d activeNew, +3 this week
Posts per day
The posts behind it
[Feature]: Deterministic AST Invariant Tool Guard Callback for LangChain Agents
### Submission checklist - [x] This is a feature request, not a bug report or usage question. - [x] I added a clear and descriptive title that summarizes the feature request. - [x] I used the GitHub search to find a similar feature request and didn't find it. - [x] I checked the...
How I handled runaway tool-retry loops in LangChain agents without external SaaS (built an open-source local circuit breaker)
...dashboard in Next.js that streams logs live via SSE so you don't have to deal with annoying polling delay. There’s also a physical-style kill switch to pause all traffic instantly if an agent goes wild.. Zero external telemetry: Everything is local SQLite and in-memory buffers....
How I handled runaway tool-retry loops in LangChain agents without external SaaS (built an open-source local circuit breaker)
...dashboard in Next.js that streams logs live via SSE so you don't have to deal with annoying polling delay. There’s also a physical-style kill switch to pause all traffic instantly if an agent goes wild.. Zero external telemetry: Everything is local SQLite and in-memory buffers....
Companies and products named
About this problem
Evidence
3 posts from 2 people in 2 places, about 3 a week over 1 days. Mostly on r/LangChain, langchain-ai/langchain. Tools named alongside: GitHub, Claude, SQLite, CrewAI.
Frustration Frustration 0 of 3· Seen on Reddit, GitHub issues
How it was grouped
Posts that state a pain and match the "prompt-injection" rule about LangChain. First post Oct 27, 2026, latest Oct 27, 2026. Corroborated: 3 or more posts from 2 or more people or places. Method
The same problem elsewhere
Prompt injection makes AI features unsafe to ship
9 posts from 9 people on GitHub issues, Reddit.
Prompt injection makes Anthropic features unsafe
3 posts from 3 people on GitHub issues, Hacker News.
Prompt injection makes Model Context Protocol features unsafe
2 posts from 2 people on GitHub issues. Unverified.
Prompt injection makes LlamaIndex features unsafe
2 posts from 2 people on GitHub issues. Unverified.
Other LangChain problems
LangChain agents loop, stall or fail midway
5 posts from 5 people on Reddit, GitHub issues.
LangChain upgrades break working setups
10 posts from 10 people on GitHub issues, Reddit.
LangChain users keep filing bugs
Top post: "langchain 1.4.0: any after_model middleware using documented `jump_to=tools` bypasses the HITL", one of 24 posts from 21 people on GitHub issues, Reddit.
RAG on LangChain returns irrelevant or missing context
8 posts from 7 people on Reddit, GitHub issues, Stack Overflow.
Trouble with LangChain agent
Top post: "langchain-classic: importing a moved agent from `agent_toolkits` raises `ValueError` instead of `ImportError`", one of 7 posts from 6 people on GitHub issues, Reddit, Stack Overflow.
LangChain rate limits and usage caps block work
4 posts from 3 people on GitHub issues.
Trouble with LangChain agents
Top post: "Is it normal for a LangGraph supervisor to consume as many tokens as all 8 agents combined? How can we", one of 4 posts from 4 people on Reddit.
Trouble with LangChain test
Top post: "langchain: MCP adapter test asserts a POSIX-only error message, fails on Windows where the drive letter", one of 3 posts from 3 people on GitHub issues.
LangChain error messages are cryptic
3 posts from 2 people on GitHub issues.
LangChain vulnerabilities are hard to triage and patch
3 posts from 1 person on GitHub issues. Unverified.
LangChain integrations break or are missing
2 posts from 2 people on GitHub issues. Unverified.
Trouble with LangChain valueerror
Top post: "core: check_valid_template raises ValueError for mustache template_format", one of 2 posts from 2 people on GitHub issues. Unverified.
History