CVE-2025-8396 json
Temporal OSS Server Vulnerable to Allocation of Resources Without Limits or Throttling
published last yr. modified last mo. also GHSA-p768-c3pr-6459 , GO-2025-3953 , EUVD-2025-29200
- cvss
- 6.9
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go go.temporal.io/server 1.26.3, 1.27.3, 1.28.1
- Temporal OSS Server 1.26.3, 1.27.3, 1.28.1
- govulncheck-vulndb SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 0.0.20250918T182144-150000.1.107.1
suse advisories SUSE-SU-2025:03289-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
- govulncheck-vulndb openSUSE Tumbleweed 0.0.20250917T170349-1.1
opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2025:15564-1
Is CVE-2025-8396 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | 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 |
| CNA | 4.0 | 6.9 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | go.temporal.io/server | <1.26.3 >=1.27.0-126.0, <1.27.3 >=1.28.0-129.0, <1.28.1 |
1.26.3 1.27.3 1.28.1 |
Affected products
- Temporal OSS Server
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
github.com
/temporalio/temporal/releases/tag/v1.26.3
web
-
github.com
/temporalio/temporal/releases/tag/v1.27.3
web
-
github.com
/temporalio/temporal/releases/tag/v1.28.1
web
-
nvd.nist.gov
/vuln/detail/CVE-2025-8396
advisory
-
github.com
/temporalio/temporal
package
-
github.com
/advisories/GHSA-p768-c3pr-6459
advisory
Sources
- CVE List CVE-2025-8396
- GitHub Advisory GHSA-p768-c3pr-6459
- NVD CVE-2025-8396
- OSV GO-2025-3953
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.