CVE-2026-118667

LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests

CVSS score

4.3

EPSS probability

—

Risk score

0.4

Published

3 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach AI Explanation

Verified against sources

LangGraph SDK v3 Streaming Request Redirection Vulnerability

Sources read

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

A lack of encoding in LangGraph SDK and langgraph packages can allow authenticated GET requests to be redirected to another path on the server.

Why does it matter?

Attackers can retain authentication headers to access other readable paths on the configured server and target sensitive data.

What should be done?

Upgrade langgraph-sdk to version 0.4.6 or later
If using RemoteGraph, also upgrade langgraph to version 1.2.14 or later
Follow vendor advisories and official updates

Chain of evidence and sources2 verified claims

langgraph-sdk sürümleri 0.4.0 ile 0.4.6 arasında bu zafiyetten etkilenmektedir.

S0 · daybreach-canonical S1 · cvelist S2 · github

langgraph sürümleri 1.2.3 ile 1.2.14 arasında RemoteGraph v3 akışı zafiyetten etkilenmektedir.

S0 · daybreach-canonical S1 · cvelist S2 · github

Show the technical text from the sources

LangGraph Python SDK is used to connect to running LangGraph API servers, manage assistants, threads and stream runs from Python applications. From langgraph-sdk 0.4.0 until 0.4.6, and from langgraph 1.2.3 until 1.2.14 when RemoteGraph v3 streaming uses an affected langgraph-sdk version, the synchronous and asynchronous v3 stream get_tree and _fetch_state helpers interpolate caller-controlled assistant_id and thread_id values into authenticated GET request paths without using _quote_path_param. Relative path segments can therefore be normalized into another readable path on the configured server while retaining authentication headers. This issue is fixed in langgraph-sdk 0.4.6 and langgraph 1.2.14.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CWE: CWE-22

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-118667 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	langchain-ai	langgraph	View
2	langchain-ai	langgraph-sdk	View
3	pypi	langgraph-sdk	View
4	pypi	langgraph	View

Total affected vendors: 2|Products: 4

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
4.3	CVSS V31	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	NVD
4.3	CVSS V3_1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	CVE CNA
4.3	CVSS 3.x	—	Vector not published	GitHub Advisory
0.0	CVSS 4.0	—	Vector not published	GitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-118667 is associated with the following CWEs:

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-118667 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsLow

UserGerekmiyor

Official Sources and Advisories

https://github.com/langchain-ai/langgraph/security/advisories/GHSA-3fx2-cqw9-xr3cvendor-advisory https://github.com/langchain-ai/langgraph/pull/9213vendor-advisory https://github.com/langchain-ai/langgraph/commit/d89c7e100ec6fc1512544d23b0a7c5169699ef3evendor-advisory https://github.com/langchain-ai/langgraph/releases/tag/1.2.14vendor-advisory https://github.com/langchain-ai/langgraph/releases/tag/sdk%3D%3D0.4.6vendor-advisory https://github.com/advisories/GHSA-3fx2-cqw9-xr3cvendor-advisory

CVSS Vector Radar Chart

4.3 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow privileges

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

langchain-ai

pypi

Weakness Type (CWE & CAPEC)

CWE-22

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