CVE-2026-118667

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Source
https://cve.org/CVERecord?id=CVE-2026-118667
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-118667.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-118667
Aliases
Published
2026-10-28T20:51:46Z
Modified
2026-10-29T10:45:55Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
LangGraph: Unencoded identifiers in LangGraph SDK v3 streaming can redirect authenticated GET requests
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-22"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118667.json"
}
References

Affected packages

Git / github.com/langchain-ai/langgraph

Affected ranges

Type
GIT
Repo
https://github.com/langchain-ai/langgraph
Events
Introduced
83dd61feaca993d2ee428706ad04c869895ce400
Fixed
70dd64065bffaa3b6ab61a33f1f020fb54db8efa
Introduced
c7792608e3681e46bfb27555cd2ab22b57408515
Fixed
55b0e36c51d2922b11640b980fcfca1064243a96
Fixed
d89c7e100ec6fc1512544d23b0a7c5169699ef3e
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.2.3"
                },
                {
                    "fixed":  "1.2.14"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "introduced":  "0.4.0"
                },
                {
                    "fixed":  "0.4.6"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "d89c7e100ec6fc1512544d23b0a7c5169699ef3e"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "1.2.14",
            "range":  [
                {
                    "fixed":  "70dd64065bffaa3b6ab61a33f1f020fb54db8efa"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "original_tag":  "sdk==0.4.6",
            "range":  [
                {
                    "fixed":  "55b0e36c51d2922b11640b980fcfca1064243a96"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

1.*
1.2.10
1.2.11
1.2.12
1.2.13
1.2.3
1.2.4
1.2.5
1.2.6
1.2.7
1.2.8
1.2.9
checkpoint==4.*
checkpoint==4.2.0
checkpointpostgres==3.*
checkpointpostgres==3.1.1
checkpointpostgres==3.1.2
checkpointsqlite==3.*
checkpointsqlite==3.1.1
cli==0.*
cli==0.4.28
cli==0.4.29
cli==0.4.30
cli==0.4.31
cli==0.4.32
sdk==0.*
sdk==0.4.3
sdk==0.4.4
sdk==0.4.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-118667.json"