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CVE-2025-8396

Quick assessment

Affected
Temporal OSS Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Temporal OSS Server是Temporal开源的一款工作流编排引擎。 Temporal OSS Server 1.26.3之前版本、1.27.3之前版本和1.28.1之前版本存在安全漏洞，该漏洞源于授权标头边界检查不足，可能导致内存过度分配和拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.39% · P31

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2025-8396

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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/S:N/AU:Y
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Temporal OSS Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Temporal OSS Server是Temporal开源的一款工作流编排引擎。 Temporal OSS Server 1.26.3之前版本、1.27.3之前版本和1.28.1之前版本存在安全漏洞，该漏洞源于授权标头边界检查不足，可能导致内存过度分配和拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Temporal OSS Server 0 ~ 1.26.3 -

II. Public POCs for CVE-2025-8396

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III. Intelligence Information for CVE-2025-8396

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IV. Related Vulnerabilities

Same vendor: Temporal
Same weakness: CWE-770

V. Comments for CVE-2025-8396

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