CVE-2026-25750

CVE Enrichment

CVSS: 8.5 HIGH
EPSS: 0.35%
EPSS Percentile: 28.64%
CISA KEV: Not listed

Description

Langchain Helm Charts are Helm charts for deploying Langchain applications on Kubernetes. Prior to langchain-ai/helm version 0.12.71, a URL parameter injection vulnerability existed in LangSmith Studio that could allow unauthorized access to user accounts through stolen authentication tokens. The vulnerability affected both LangSmith Cloud and self-hosted deployments. Authenticated LangSmith users who clicked on a specially crafted malicious link would have their bearer token, user ID, and workspace ID transmitted to an attacker-controlled server. With this stolen token, an attacker could impersonate the victim and access any LangSmith resources or perform any actions the user was authorized to perform within their workspace. The attack required social engineering (phishing, malicious links in emails or chat applications) to convince users to click the crafted URL. The stolen tokens expired after 5 minutes, though repeated attacks against the same user were possible if they could be convinced to click malicious links multiple times. The fix in version 0.12.71 implements validation requiring user-defined allowed origins for the baseUrl parameter, preventing tokens from being sent to unauthorized servers. No known workarounds are available. Self-hosted customers must upgrade to the patched version.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: [email protected]
Published: 05-Mar-2026 05:16
Last Modified: 17-Jun-2026 17:25
EPSS Date: 2026-11-08
CWE: CWE-74

CVSS Vector


            CVSS:4.0                            AV:N /
                            AC:L /
                            AT:N /
                            PR:N /
                            UI:A /
                            VC:H /
                            VI:H /
                            VA:N /
                            SC:N /
                            SI:N /
                            SA:N /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

CNA Products / Version Status

langchain-ai · helm Source: CNA · [email protected]
Default status: unknown

< 0.12.71 — affected

Affected Products / Versions

langchain / langsmith Source: NVD CPE · affected
Version / affected range: * · before (exclusive) 0.12.71
cpe:2.3:a:langchain:langsmith:*:*:*:*:*:kubernetes:*:*

References

[email protected]

Last enrichment sync: 08-Nov-2026 22:55
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

LangSmith had a URL parameter injection (CVE-2026-25750) that could steal bearer tokens and enable account takeover, fixed in LangSmith v0.12.71. Researchers Detail Data-Exfiltration Risk in Amazon Bedrock and Flaws in LangSmith and SGLang

CVE (3)

People (5)

MITRE ATT&CK (6)

Vendors (1)

Products (3)

Industries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.