Security Bulletin
Summary
IBM Watson Speech Services Cartridge is vulnerable to a Server-Side Request Forgery in LangSmith, due to a flaw allowing the injection of arbitrary api_url values through the baggage header, causing the SDK to exfiltrate sensitive trace data to attacker-controlled endpoints [CVE-2026-25528]. LangSmith is used in our speech runtimes. This vulnerabilitiy has been addressed. Please read the details for remediation below.
Vulnerability Details
CVEID: CVE-2026-25528
DESCRIPTION: LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. The LangSmith SDK's distributed tracing feature is vulnerable to Server-Side Request Forgery via malicious HTTP headers. An attacker can inject arbitrary api_url values through the baggage header, causing the SDK to exfiltrate sensitive trace data to attacker-controlled endpoints. When using distributed tracing, the SDK parses incoming HTTP headers via RunTree.from_headers() in Python or RunTree.fromHeaders() in Typescript. The baggage header can contain replica configurations including api_url and api_key fields. Prior to the fix, these attacker-controlled values were accepted without validation. When a traced operation completes, the SDK's post() and patch() methods send run data to all configured replica URLs, including any injected by an attacker. This vulnerability is fixed in version 0.6.3 of the Python SDK and 0.4.6 of the JavaScript SDK.
CWE: CWE-918: Server-Side Request Forgery (SSRF)
CVSS Source: security-advisories@github.com
CVSS Base score: 5.8
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Watson Speech Services Cartridge | 4.0.0 - 5.3.1 |
Remediation/Fixes
| Product(s) | Version(s) | Remediation/Fix/Instructions |
| IBM Watson Speech Services Cartridge | 5.3.1 Patch 5 | The fix in 5.3.1 Patch 5 applies to all versions listed (4.0.0-5.3.1). The newest version of 5.3.1 with the included Patch 5 can be downloaded and installed from: https://www.ibm.com/docs/en/cloud-paks/cp-data/5.3.x |
Workarounds and Mitigations
None
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References
Acknowledgement
Change History
21 May 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
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Document Location
Worldwide
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Document Information
Modified date:
21 May 2026
Initial Publish date:
21 May 2026
UID
ibm17273682