CVE-2025-8396 - CVE House
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Status published Medium CVE-2025-8396

Insufficiently specific bounds checking on authorization header could lead to...

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from Temporal

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CVE-2025-14987
Cross Namespace Commands Authorization Bypass
Medium 5.3
CVE-2025-14986
ExecuteMultiOperation Namespace Policy Bypass
Low 1.3

Affected Vendor

Affected Software

OSS Server
Vulnerable Versions:
0, 1.27.0, 1.28.0

Timeline

Official Publish: September 15th, 2025
Last Modified: September 15th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-770

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service
Impact
T1498 Network Denial of Service
Impact
T1190 Exploit Public-Facing Application
Initial Access
T1562 Impair Defenses
Defense Evasion
T1046 Network Service Discovery
Discovery