{"cve":"CVE-2025-8396","nvd":{"published":"2025-09-15T15:15:55.280","modified":"2026-06-17T10:06:53.130","status":"Deferred","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.","cvss_v4":{"vector":"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","score":6.9},"cvss_v3":null,"cwes":["CWE-770"],"references":["https://github.com/temporalio/temporal/releases/tag/v1.26.3","https://github.com/temporalio/temporal/releases/tag/v1.27.3","https://github.com/temporalio/temporal/releases/tag/v1.28.1"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:08:41.295252406+00:00"},"epss":{"cve":"CVE-2025-8396","score":0.00388,"percentile":0.329,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-p768-c3pr-6459","url":"https://osv.dev/vulnerability/GHSA-p768-c3pr-6459","summary":"Temporal OSS Server Vulnerable to Allocation of Resources Without Limits or Throttling","modified":"2026-09-10T03:50:28.569739781Z","packages":[{"ecosystem":"Go","name":"go.temporal.io/server","purl":"pkg:golang/go.temporal.io/server","ranges":["<1.26.3"],"fixed":["1.26.3"]},{"ecosystem":"Go","name":"go.temporal.io/server","purl":"pkg:golang/go.temporal.io/server","ranges":[">=1.27.0-126.0 <1.27.3"],"fixed":["1.27.3"]},{"ecosystem":"Go","name":"go.temporal.io/server","purl":"pkg:golang/go.temporal.io/server","ranges":[">=1.28.0-129.0 <1.28.1"],"fixed":["1.28.1"]}]},{"id":"GO-2025-3953","url":"https://osv.dev/vulnerability/GO-2025-3953","summary":"Temporal OSS Server Vulnerable to Allocation of Resources Without Limits or Throttling in go.temporal.io/server","modified":"2026-02-04T04:36:36.635537Z","packages":[{"ecosystem":"Go","name":"go.temporal.io/server","purl":"pkg:golang/go.temporal.io/server","ranges":["<1.26.3",">=1.27.0-126.0 <1.27.3",">=1.28.0-129.0 <1.28.1"],"fixed":["1.26.3","1.27.3","1.28.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}