CVE-2025-8396: GO-2025-3953 - Temporal OSS Server Vulnerable to Allocation of Resources Without Limits or Throttling in go.temporal.io/server

CVE-2025-8396 · Severity: medium · CVSS 4 · Published 2025-09-17

Temporal OSS Server Vulnerable to Allocation of Resources Without Limits or Throttling in go.temporal.io/server

Technologies: go.temporal.io/server (Go). Vendors: Go.

Quick answers

Is CVE-2025-8396 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-8396 being exploited in the wild.
How severe is CVE-2025-8396?
Medium severity, with a CVSS score of 4, published 17 September 2025.
Which products and versions are affected?
go.temporal.io/server (Go) SEMVER:introduced=0,fixed=1.26.3, SEMVER:introduced=0,fixed=1.26.3,introduced=1.27.0-126.0,fixed=1.27.3,introduced=1.28.0-129.0,fixed=1.28.1.
Is there a fix for CVE-2025-8396?
Yes. go.temporal.io/server (Go): upgrade to 1.26.3, 1.28.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-8396?
Check whether you run go.temporal.io/server (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • go.temporal.io/server (Go): upgrade to 1.26.3, 1.28.1 or later
    go get go.temporal.io/server@v1.28.1

Affected products

  • go.temporal.io/server (Go) SEMVER:introduced=0,fixed=1.26.3, SEMVER:introduced=0,fixed=1.26.3,introduced=1.27.0-126.0,fixed=1.27.3,introduced=1.28.0-129.0,fixed=1.28.1

Identifiers

  • CVE-2025-8396
  • GHSA-p768-c3pr-6459
  • GO-2025-3953

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