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Vulnerabilities

Vulnerability · CVE-2026-118667

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

Published Oct 28, 2026 · LangGraph: Unencoded identifiers in

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-118667. EPSS is 0.39%. Act only if a listed version of LangGraph: Unencoded identifiers in is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (LangGraph: Unencoded identifiers in).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.39%
Remediation
Not established
Affected products
pypi langgraph · pypi langgraph-sdk

The LangGraph Python SDK v3 streaming client interpolates caller-supplied thread_id and assistant_id values into request paths without encoding them at four synchronous and asynchronous call sites. Relative path segments can therefore redirect an authenticated GET request to another path on the same configured server.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • pypi langgraphversion unspecified
  • pypi langgraph-sdkversion unspecified

How to fix CVE-2026-118667

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-118667. EPSS is 0.39%. Act only if a listed version of LangGraph: Unencoded identifiers in is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.39%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 28, 2026 · GitLab Advisory Database

    Detected

    The LangGraph Python SDK v3 streaming client interpolates caller-supplied thread_id and assistant_id values into request paths without encoding them at four synchronous and asynchronous call sites. Relative path segments can therefore redirect an authenticated GET request to another path on the same configured server.

Sources

  • CVE.orgVulnerability recordCVE-2026-118667

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-118667

    30-day exploitation probability 0.39%

    first.org
  • GitLab Advisory DatabasePackage advisoryCVE-2026-118667

    The LangGraph Python SDK v3 streaming client interpolates caller-supplied thread_id and assistant_id values into request paths without encoding them at four synchronous and asynchronous call sites. Relative path segments can therefore redirect an authenticated GET request to another path on the same configured server.

    advisories.gitlab.com

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • GitLab Advisory DatabaseOct 30, 2026
  • CVE.orgOct 29, 2026