CVE-2025-8396

Insufficiently specific bounds checking on authorization header could lead to denial of service in the Temporal server on all platforms due to excessive memory allocation.This issue affects all platforms and versions of OSS Server prior to 1.26.3, 1.27.3, and 1.28.1 (i.e., fixed in 1.26.3, 1.27.3, and 1.28.1 and later). Temporal Cloud services are not impacted.

Score

CVSS 4.0 6.9 Medium

Status

Deferred - security@temporal.io

Published

2025-09-15

Last modified

2025-09-15

Weaknesses

CWE-770

Affected products

• Oss Server (Temporal)

References

• https://github.com/temporalio/temporal/releases/tag/v1.26.3
• https://github.com/temporalio/temporal/releases/tag/v1.27.3
• https://github.com/temporalio/temporal/releases/tag/v1.28.1