gcdRadar
archive/Patch now/AIR-2026-1624
closedclosed 28 Oct 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-118667: LangGraph SDK Unencoded Identifiers Request Redirection

LangGraph Python SDK

The LangGraph Python SDK v3 streaming client fails to properly encode caller-supplied identifiers in request paths. This flaw can redirect authenticated GET requests to other paths on the server.

why this severityDisclosed vulnerability with no confirmed exploitation.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
4.3
EPSS
<0.01 · top 66% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
affected
LangGraph Python SDK v3
first report
28 Oct 2026
last update
28 Oct 2026
CVE ids
CVE-2026-118667other records

Timeline · 1

  1. 28 Oct 2026CVE-2026-118667: LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests

Sources · 1

Advisories and databases

  1. 2026-10-28
    CVE-2026-118667: LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests
    GitHub Advisory Database · github.com/advisories/GHSA-3fx2-cqw9-xr3c

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
langgraph
dates
happened 28 Oct 2026 · first reported 28 Oct 2026
origin
GitHub Advisory Database
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-29 00:20Z · updated 2026-10-29 00:20Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-118667: LangGraph SDK Unencoded Identifiers Request Redirection

https://gcdradar.vercel.app/incidents/cve-2026-118667-langgraph-sdk-unencoded-identifiers-request · AIR-2026-1624 · closed 2026-10-28

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability): Disclosed vulnerability with no confirmed exploitation.
- Fix status: Fix status unknown
- First reported: 2026-10-28
- AI role: Attack on AI
- Products: LangGraph Python SDK
- CVE ids: CVE-2026-118667
- CVSS: 4.3

## Summary

The LangGraph Python SDK v3 streaming client fails to properly encode caller-supplied identifiers in request paths. This flaw can redirect authenticated GET requests to other paths on the server.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Affected and fixed versions

- Affected: LangGraph Python SDK v3

## Latest updates

- 2026-10-28: CVE-2026-118667: LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests (https://github.com/advisories/GHSA-3fx2-cqw9-xr3c)

## Sources

- 2026-10-28 GitHub Advisory Database: CVE-2026-118667: LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests https://github.com/advisories/GHSA-3fx2-cqw9-xr3c

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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