CVE-2025-8396

EPSS 0.14%

Temporal OSS Server Vulnerable to Allocation of Resources Without Limits or Throttling

Published: 9/15/2025Modified: 2/4/2026

Also known as:GHSA-p768-c3pr-6459CGA-7639-fg56-q8ffGO-2025-3953

Description

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.

Affected packages (2)

Go/go.temporal.io/serverfrom 0, < 1.26.3
Go/go.temporal.io/serverfrom 0, < 1.26.3, >= 1.27.0-126.0, < 1.27.3, >= 1.28.0-129.0, < 1.28.1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 4.0	—	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

References (6)

ADVISORYhttps://github.com/advisories/GHSA-p768-c3pr-6459
ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-8396
PATCHhttps://github.com/temporalio/temporal
WEBhttps://github.com/temporalio/temporal/releases/tag/v1.26.3
WEBhttps://github.com/temporalio/temporal/releases/tag/v1.27.3
WEBhttps://github.com/temporalio/temporal/releases/tag/v1.28.1