# CVE-2025-1243: Field in api-go proxy not transformed before version 1.44.1

> CVE-2025-1243: Field in api-go proxy not transformed before version 1.44.1. CVSS 2.0 (CVSS 4.0).

Canonical: https://rewindex.com/cve/CVE-2025-1243
Last updated: 2026-06-17T08:38:40Z

- Published: 2025-02-12 00:09 UTC · Updated: 2026-06-17 08:38 UTC · Assigner: Temporal
- CVSS: 2.0 (CVSS 4.0) · Severity: Low
- EPSS: 0.09%, 1th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-311

## Description

The Temporal api-go library prior to version 1.44.1 did not send \`update response\` information to Data Converter when the proxy package within the api-go module was used in a gRPC proxy prior to transmission. This resulted in information contained within the \`update response\` field not having Data Converter transformations (e.g. encryption) applied. This is an issue only when using the UpdateWorkflowExecution APIs (released on 13th January 2025)  with a proxy leveraging the api-go library before version 1.44.1. Other data fields were correctly sent to Data Converter. This issue does not impact the Data Converter server. Data was encrypted in transit. Temporal Cloud services are not impacted.

## Affected vendors and products

- Temporal Technologies, Inc.: api-go library

## Tracked companies

- [Temporal Cloud](https://rewindex.com/company/temporal-cloud.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-1243)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-1243)
- [https://github.com/temporalio/api-go/releases/tag/v1.44.1](https://github.com/temporalio/api-go/releases/tag/v1.44.1)
- [https://temporal.io/blog/announcing-a-new-operation-workflow-update](https://temporal.io/blog/announcing-a-new-operation-workflow-update)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-1243 · Markdown: https://rewindex.com/cve/CVE-2025-1243.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-1243 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:14.059Z